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-rw-r--r--nixos/doc/manual/Makefile2
-rw-r--r--nixos/doc/manual/administration/container-networking.xml3
-rw-r--r--nixos/doc/manual/configuration/linux-kernel.xml19
-rw-r--r--nixos/doc/manual/development/debugging-nixos-tests.xml37
-rw-r--r--nixos/doc/manual/development/nixos-tests.xml1
-rw-r--r--nixos/doc/manual/installation/installing-behind-a-proxy.xml47
-rw-r--r--nixos/doc/manual/installation/installing-usb.xml48
-rw-r--r--nixos/doc/manual/installation/installing.xml707
-rw-r--r--nixos/doc/manual/manual.xml4
-rw-r--r--nixos/doc/manual/release-notes/rl-1509.xml10
-rw-r--r--nixos/doc/manual/release-notes/rl-1809.xml607
-rw-r--r--nixos/doc/manual/release-notes/rl-1903.xml11
-rw-r--r--nixos/lib/test-driver/Machine.pm6
-rw-r--r--nixos/modules/hardware/opengl.nix22
-rw-r--r--nixos/modules/hardware/steam-hardware.nix25
-rw-r--r--nixos/modules/hardware/video/nvidia.nix120
-rw-r--r--nixos/modules/i18n/input-method/default.xml319
-rw-r--r--nixos/modules/installer/tools/nix-fallback-paths.nix8
-rw-r--r--nixos/modules/installer/tools/nixos-generate-config.pl3
-rw-r--r--nixos/modules/installer/tools/nixos-option.sh4
-rw-r--r--nixos/modules/misc/ids.nix6
-rw-r--r--nixos/modules/misc/version.nix5
-rw-r--r--nixos/modules/module-list.nix6
-rw-r--r--nixos/modules/programs/bash/bash.nix2
-rw-r--r--nixos/modules/programs/digitalbitbox/doc.xml97
-rw-r--r--nixos/modules/programs/light.nix5
-rw-r--r--nixos/modules/programs/plotinus.xml37
-rw-r--r--nixos/modules/programs/zsh/oh-my-zsh.xml182
-rw-r--r--nixos/modules/programs/zsh/zsh.nix2
-rw-r--r--nixos/modules/rename.nix1
-rw-r--r--nixos/modules/security/acme.xml104
-rw-r--r--nixos/modules/security/hidepid.xml37
-rw-r--r--nixos/modules/security/pam.nix7
-rw-r--r--nixos/modules/security/polkit.nix10
-rw-r--r--nixos/modules/services/cluster/kubernetes/default.nix8
-rw-r--r--nixos/modules/services/databases/foundationdb.xml621
-rw-r--r--nixos/modules/services/databases/postgresql.xml94
-rw-r--r--nixos/modules/services/desktops/flatpak.xml71
-rw-r--r--nixos/modules/services/desktops/profile-sync-daemon.nix136
-rw-r--r--nixos/modules/services/editors/emacs.xml821
-rw-r--r--nixos/modules/services/hardware/triggerhappy.nix114
-rw-r--r--nixos/modules/services/logging/journaldriver.nix2
-rw-r--r--nixos/modules/services/mail/rspamd.nix83
-rw-r--r--nixos/modules/services/misc/emby.nix2
-rw-r--r--nixos/modules/services/misc/gitlab.xml124
-rw-r--r--nixos/modules/services/misc/lidarr.nix46
-rw-r--r--nixos/modules/services/misc/nix-daemon.nix7
-rw-r--r--nixos/modules/services/misc/nix-optimise.nix2
-rw-r--r--nixos/modules/services/misc/sickbeard.nix92
-rw-r--r--nixos/modules/services/misc/taskserver/doc.xml209
-rw-r--r--nixos/modules/services/misc/weechat.xml73
-rw-r--r--nixos/modules/services/monitoring/prometheus/alertmanager.nix23
-rw-r--r--nixos/modules/services/monitoring/prometheus/exporters.xml148
-rw-r--r--nixos/modules/services/monitoring/prometheus/exporters/snmp.nix8
-rw-r--r--nixos/modules/services/networking/bitlbee.nix41
-rw-r--r--nixos/modules/services/networking/charybdis.nix2
-rw-r--r--nixos/modules/services/networking/dnscrypt-proxy.xml69
-rw-r--r--nixos/modules/services/networking/miniupnpd.nix24
-rw-r--r--nixos/modules/services/networking/murmur.nix2
-rw-r--r--nixos/modules/services/networking/shairport-sync.nix3
-rw-r--r--nixos/modules/services/security/clamav.nix7
-rw-r--r--nixos/modules/services/web-apps/matomo-doc.xml131
-rw-r--r--nixos/modules/services/web-apps/nextcloud.nix463
-rw-r--r--nixos/modules/services/web-apps/tt-rss.nix6
-rw-r--r--nixos/modules/services/web-servers/nginx/default.nix17
-rw-r--r--nixos/modules/services/web-servers/nginx/location-options.nix10
-rw-r--r--nixos/modules/services/x11/desktop-managers/gnome3.nix1
-rw-r--r--nixos/modules/services/x11/desktop-managers/plasma5.nix9
-rw-r--r--nixos/modules/services/x11/display-managers/default.nix11
-rw-r--r--nixos/modules/services/x11/display-managers/gdm.nix17
-rw-r--r--nixos/modules/services/x11/display-managers/lightdm-greeters/enso-os.nix159
-rw-r--r--nixos/modules/services/x11/display-managers/lightdm.nix17
-rw-r--r--nixos/modules/services/x11/display-managers/sddm.nix4
-rw-r--r--nixos/modules/services/x11/display-managers/startx.nix44
-rw-r--r--nixos/modules/services/x11/xserver.nix10
-rw-r--r--nixos/modules/system/activation/activation-script.nix62
-rw-r--r--nixos/modules/system/activation/switch-to-configuration.pl3
-rw-r--r--nixos/modules/system/activation/top-level.nix1
-rw-r--r--nixos/modules/system/boot/initrd-network.nix27
-rw-r--r--nixos/modules/system/boot/kexec.nix2
-rw-r--r--nixos/modules/system/boot/stage-2-init.sh8
-rw-r--r--nixos/modules/system/boot/systemd-lib.nix2
-rw-r--r--nixos/modules/system/boot/systemd-unit-options.nix2
-rw-r--r--nixos/modules/system/boot/systemd.nix17
-rw-r--r--nixos/modules/testing/test-instrumentation.nix3
-rw-r--r--nixos/modules/virtualisation/container-config.nix7
-rw-r--r--nixos/modules/virtualisation/hyperv-guest.nix35
-rw-r--r--nixos/release.nix28
-rw-r--r--nixos/tests/bittorrent.nix101
-rw-r--r--nixos/tests/codimd.nix6
-rw-r--r--nixos/tests/containers-imperative.nix3
-rw-r--r--nixos/tests/docker-tools.nix4
-rw-r--r--nixos/tests/misc.nix2
-rw-r--r--nixos/tests/nextcloud/basic.nix56
-rw-r--r--nixos/tests/nextcloud/default.nix6
-rw-r--r--nixos/tests/nextcloud/with-mysql-and-memcached.nix97
-rw-r--r--nixos/tests/nextcloud/with-postgresql-and-redis.nix130
-rw-r--r--nixos/tests/nix-ssh-serve.nix4
-rw-r--r--nixos/tests/rspamd.nix54
-rw-r--r--nixos/tests/upnp.nix94
100 files changed, 4601 insertions, 2388 deletions
diff --git a/nixos/doc/manual/Makefile b/nixos/doc/manual/Makefile
index 2e9adf70c396..b251a1f5e2c3 100644
--- a/nixos/doc/manual/Makefile
+++ b/nixos/doc/manual/Makefile
@@ -4,7 +4,7 @@ all: manual-combined.xml format
 .PHONY: debug
 debug: generated manual-combined.xml
 
-manual-combined.xml: generated *.xml
+manual-combined.xml: generated *.xml **/*.xml
 	rm -f ./manual-combined.xml
 	nix-shell --packages xmloscopy \
 		--run "xmloscopy --docbook5 ./manual.xml ./manual-combined.xml"
diff --git a/nixos/doc/manual/administration/container-networking.xml b/nixos/doc/manual/administration/container-networking.xml
index 4b977d1d82eb..8aca329c8f1f 100644
--- a/nixos/doc/manual/administration/container-networking.xml
+++ b/nixos/doc/manual/administration/container-networking.xml
@@ -52,4 +52,7 @@ $ ping -c1 10.233.4.2
 networking.networkmanager.unmanaged = [ "interface-name:ve-*" ];
 </programlisting>
  </para>
+ <para>
+  You may need to restart your system for the changes to take effect.
+ </para>
 </section>
diff --git a/nixos/doc/manual/configuration/linux-kernel.xml b/nixos/doc/manual/configuration/linux-kernel.xml
index 2f766f2b32f7..644d3a33ffd2 100644
--- a/nixos/doc/manual/configuration/linux-kernel.xml
+++ b/nixos/doc/manual/configuration/linux-kernel.xml
@@ -84,18 +84,17 @@ nixpkgs.config.packageOverrides = pkgs:
     allowImportFromDerivation = true;
   };
   ]]></screen>
-
-You can edit the config with this snippet (by default <command>make menuconfig</command> won't work
-  out of the box on nixos):
-  <screen><![CDATA[
+   You can edit the config with this snippet (by default <command>make
+   menuconfig</command> won't work out of the box on nixos):
+<screen><![CDATA[
       nix-shell -E 'with import <nixpkgs> {}; kernelToOverride.overrideAttrs (o: {nativeBuildInputs=o.nativeBuildInputs ++ [ pkgconfig ncurses ];})'
   ]]></screen>
-
-
-  or you can let nixpkgs generate the configuration.
-  Nixpkgs generates it via answering the interactive kernel utility <command>make config</command>.
-  The answers depend on parameters passed to <filename>pkgs/os-specific/linux/kernel/generic.nix</filename>
-  (which you can influence by overriding <literal>extraConfig, autoModules, modDirVersion, preferBuiltin, extraConfig</literal>).
+   or you can let nixpkgs generate the configuration. Nixpkgs generates it via
+   answering the interactive kernel utility <command>make config</command>. The
+   answers depend on parameters passed to
+   <filename>pkgs/os-specific/linux/kernel/generic.nix</filename> (which you
+   can influence by overriding <literal>extraConfig, autoModules,
+   modDirVersion, preferBuiltin, extraConfig</literal>).
 <screen><![CDATA[
 
   mptcp93.override ({
diff --git a/nixos/doc/manual/development/debugging-nixos-tests.xml b/nixos/doc/manual/development/debugging-nixos-tests.xml
new file mode 100644
index 000000000000..30e58e1e3554
--- /dev/null
+++ b/nixos/doc/manual/development/debugging-nixos-tests.xml
@@ -0,0 +1,37 @@
+<section xmlns="http://docbook.org/ns/docbook"
+        xmlns:xlink="http://www.w3.org/1999/xlink"
+        xmlns:xi="http://www.w3.org/2001/XInclude"
+        version="5.0"
+        xml:id="sec-debugging-nixos-tests">
+ <title>Debugging NixOS tests</title>
+
+ <para>
+  Tests may fail and infrastructure offers access to inspect machine state.
+ </para>
+
+ <para>
+  To prevent test from stopping and cleaning up, insert a sleep command:
+ </para>
+
+<programlisting>
+$machine->succeed("sleep 84000");
+</programlisting>
+
+ <para>
+  As soon as machine starts run as root:
+ </para>
+
+<programlisting>
+nix-shell -p socat --run "socat STDIO,raw,echo=0,escape=0x11 UNIX:/tmp/nix-build-vm-test-run-*.drv-0/vm-state-machine/backdoor"
+</programlisting>
+
+ <para>
+  You may need to find the correct path, replacing <literal>/tmp</literal>,
+  <literal>*</literal> or <literal>machine</literal>.
+ </para>
+
+ <para>
+  Press "enter" to open up console and login as "root". After you're done,
+  press "ctrl-q" to exit the console.
+ </para>
+</section>
diff --git a/nixos/doc/manual/development/nixos-tests.xml b/nixos/doc/manual/development/nixos-tests.xml
index 2695082e3867..d068887200a9 100644
--- a/nixos/doc/manual/development/nixos-tests.xml
+++ b/nixos/doc/manual/development/nixos-tests.xml
@@ -16,4 +16,5 @@ xlink:href="https://github.com/NixOS/nixpkgs/tree/master/nixos/tests">nixos/test
  <xi:include href="writing-nixos-tests.xml" />
  <xi:include href="running-nixos-tests.xml" />
  <xi:include href="running-nixos-tests-interactively.xml" />
+ <xi:include href="debugging-nixos-tests.xml" />
 </chapter>
diff --git a/nixos/doc/manual/installation/installing-behind-a-proxy.xml b/nixos/doc/manual/installation/installing-behind-a-proxy.xml
index c59d073c61c7..8f9baff44b51 100644
--- a/nixos/doc/manual/installation/installing-behind-a-proxy.xml
+++ b/nixos/doc/manual/installation/installing-behind-a-proxy.xml
@@ -5,28 +5,29 @@
          xml:id="sec-installing-behind-proxy">
  <title>Installing behind a proxy</title>
 
-<para>
+ <para>
   To install NixOS behind a proxy, do the following before running
   <literal>nixos-install</literal>.
-</para>
-<orderedlist numeration="arabic">
+ </para>
+
+ <orderedlist numeration="arabic">
   <listitem>
-    <para>
-      Update proxy configuration in
-      <literal>/mnt/etc/nixos/configuration.nix</literal> to keep the
-      internet accessible after reboot.
-    </para>
-    <programlisting>
+   <para>
+    Update proxy configuration in
+    <literal>/mnt/etc/nixos/configuration.nix</literal> to keep the internet
+    accessible after reboot.
+   </para>
+<programlisting>
 networking.proxy.default = &quot;http://user:password@proxy:port/&quot;;
 networking.proxy.noProxy = &quot;127.0.0.1,localhost,internal.domain&quot;;
 </programlisting>
   </listitem>
   <listitem>
-    <para>
-      Setup the proxy environment variables in the shell where you are
-      running <literal>nixos-install</literal>.
-    </para>
-    <programlisting>
+   <para>
+    Setup the proxy environment variables in the shell where you are running
+    <literal>nixos-install</literal>.
+   </para>
+<programlisting>
 # proxy_url=&quot;http://user:password@proxy:port/&quot;
 # export http_proxy=&quot;$proxy_url&quot;
 # export HTTP_PROXY=&quot;$proxy_url&quot;
@@ -34,14 +35,14 @@ networking.proxy.noProxy = &quot;127.0.0.1,localhost,internal.domain&quot;;
 # export HTTPS_PROXY=&quot;$proxy_url&quot;
 </programlisting>
   </listitem>
-</orderedlist>
+ </orderedlist>
 
-<note>
-<para>
-  If you are switching networks with different proxy configurations, use the
-  <literal>nesting.clone</literal> option in
-  <literal>configuration.nix</literal> to switch proxies at runtime.
-  Refer to <xref linkend="ch-options" /> for more information.
-</para>
-</note>
+ <note>
+  <para>
+   If you are switching networks with different proxy configurations, use the
+   <literal>nesting.clone</literal> option in
+   <literal>configuration.nix</literal> to switch proxies at runtime. Refer to
+   <xref linkend="ch-options" /> for more information.
+  </para>
+ </note>
 </section>
diff --git a/nixos/doc/manual/installation/installing-usb.xml b/nixos/doc/manual/installation/installing-usb.xml
index c5934111749c..0b311189430c 100644
--- a/nixos/doc/manual/installation/installing-usb.xml
+++ b/nixos/doc/manual/installation/installing-usb.xml
@@ -9,13 +9,12 @@
   For systems without CD drive, the NixOS live CD can be booted from a USB
   stick. You can use the <command>dd</command> utility to write the image:
   <command>dd if=<replaceable>path-to-image</replaceable>
-  of=<replaceable>/dev/sdb</replaceable></command>. Be careful about specifying
+  of=<replaceable>/dev/sdX</replaceable></command>. Be careful about specifying
   the correct drive; you can use the <command>lsblk</command> command to get a
   list of block devices.
- </para>
-
- <para>
-  On macOS:
+  <note>
+   <title>On macOS</title>
+   <para>
 <programlisting>
 $ diskutil list
 [..]
@@ -26,43 +25,16 @@ $ diskutil unmountDisk diskN
 Unmount of all volumes on diskN was successful
 $ sudo dd bs=1m if=nix.iso of=/dev/rdiskN
 </programlisting>
-  Using the 'raw' <command>rdiskN</command> device instead of
-  <command>diskN</command> completes in minutes instead of hours. After
-  <command>dd</command> completes, a GUI dialog "The disk you inserted was not
-  readable by this computer" will pop up, which can be ignored.
+    Using the 'raw' <command>rdiskN</command> device instead of
+    <command>diskN</command> completes in minutes instead of hours. After
+    <command>dd</command> completes, a GUI dialog "The disk you inserted was
+    not readable by this computer" will pop up, which can be ignored.
+   </para>
+  </note>
  </para>
 
  <para>
   The <command>dd</command> utility will write the image verbatim to the drive,
   making it the recommended option for both UEFI and non-UEFI installations.
-  For non-UEFI installations, you can alternatively use
-  <link xlink:href="http://unetbootin.sourceforge.net/">unetbootin</link>. If
-  you cannot use <command>dd</command> for a UEFI installation, you can also
-  mount the ISO, copy its contents verbatim to your drive, then either:
-  <itemizedlist>
-   <listitem>
-    <para>
-     Change the label of the disk partition to the label of the ISO (visible
-     with the blkid command), or
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     Edit <filename>loader/entries/nixos-livecd.conf</filename> on the drive
-     and change the <literal>root=</literal> field in the
-     <literal>options</literal> line to point to your drive (see the
-     documentation on <literal>root=</literal> in
-     <link xlink:href="https://www.kernel.org/doc/Documentation/admin-guide/kernel-parameters.txt">
-     the kernel documentation</link> for more details).
-    </para>
-   </listitem>
-   <listitem>
-    <para>
-     If you want to load the contents of the ISO to ram after bootin (So you
-     can remove the stick after bootup) you can append the parameter
-     <literal>copytoram</literal> to the <literal>options</literal> field.
-    </para>
-   </listitem>
-  </itemizedlist>
  </para>
 </section>
diff --git a/nixos/doc/manual/installation/installing.xml b/nixos/doc/manual/installation/installing.xml
index 916384559e24..8e94f946c5ee 100644
--- a/nixos/doc/manual/installation/installing.xml
+++ b/nixos/doc/manual/installation/installing.xml
@@ -4,60 +4,46 @@
             version="5.0"
             xml:id="sec-installation">
  <title>Installing NixOS</title>
- <para>
-  NixOS can be installed on BIOS or UEFI systems. The procedure for a UEFI
-  installation is by and large the same as a BIOS installation. The differences
-  are mentioned in the steps that follow.
- </para>
- <orderedlist>
-  <listitem>
-   <para>
-    Boot from the CD.
-   </para>
-   <variablelist>
-    <varlistentry>
-     <term>
-      UEFI systems
-     </term>
-     <listitem>
-      <para>
-       You should boot the live CD in UEFI mode (consult your specific
-       hardware's documentation for instructions). You may find the
-       <link xlink:href="http://www.rodsbooks.com/refind">rEFInd boot
-       manager</link> useful.
-      </para>
-     </listitem>
-    </varlistentry>
-   </variablelist>
-  </listitem>
-  <listitem>
-   <para>
-    The CD contains a basic NixOS installation. (It also contains Memtest86+,
-    useful if you want to test new hardware). When it’s finished booting, it
-    should have detected most of your hardware.
-   </para>
-  </listitem>
-  <listitem>
-   <para>
-    The NixOS manual is available on virtual console 8 (press Alt+F8 to access)
-    or by running <command>nixos-help</command>.
-   </para>
-  </listitem>
-  <listitem>
-   <para>
-    You get logged in as <literal>root</literal> (with empty password).
-   </para>
-  </listitem>
-  <listitem>
-   <para>
-    If you downloaded the graphical ISO image, you can run <command>systemctl
-    start display-manager</command> to start KDE. If you want to continue on
-    the terminal, you can use <command>loadkeys</command> to switch to your
-    preferred keyboard layout. (We even provide neo2 via <command>loadkeys de
-    neo</command>!)
-   </para>
-  </listitem>
-  <listitem>
+ <section xml:id="sec-installation-booting">
+  <title>Booting the system</title>
+
+  <para>
+   NixOS can be installed on BIOS or UEFI systems. The procedure for a UEFI
+   installation is by and large the same as a BIOS installation. The
+   differences are mentioned in the steps that follow.
+  </para>
+
+  <para>
+   The installation media can be burned to a CD, or now more commonly, "burned"
+   to a USB drive (see <xref linkend="sec-booting-from-usb"/>).
+  </para>
+
+  <para>
+   The installation media contains a basic NixOS installation. When it’s
+   finished booting, it should have detected most of your hardware.
+  </para>
+
+  <para>
+   The NixOS manual is available on virtual console 8 (press Alt+F8 to access)
+   or by running <command>nixos-help</command>.
+  </para>
+
+  <para>
+   You are logged-in automatically as <literal>root</literal>. (The
+   <literal>root</literal> user account has an empty password.)
+  </para>
+
+  <para>
+   If you downloaded the graphical ISO image, you can run <command>systemctl
+   start display-manager</command> to start KDE. If you want to continue on the
+   terminal, you can use <command>loadkeys</command> to switch to your
+   preferred keyboard layout. (We even provide neo2 via <command>loadkeys de
+   neo</command>!)
+  </para>
+
+  <section xml:id="sec-installation-booting-networking">
+   <title>Networking in the installer</title>
+
    <para>
     The boot process should have brought up networking (check <command>ip
     a</command>). Networking is necessary for the installer, since it will
@@ -65,60 +51,167 @@
     binaries). It’s best if you have a DHCP server on your network. Otherwise
     configure networking manually using <command>ifconfig</command>.
    </para>
+
    <para>
     To manually configure the network on the graphical installer, first disable
     network-manager with <command>systemctl stop network-manager</command>.
    </para>
+
    <para>
     To manually configure the wifi on the minimal installer, run
     <command>wpa_supplicant -B -i interface -c &lt;(wpa_passphrase 'SSID'
     'key')</command>.
    </para>
-  </listitem>
-  <listitem>
+
    <para>
     If you would like to continue the installation from a different machine you
     need to activate the SSH daemon via <literal>systemctl start
     sshd</literal>. In order to be able to login you also need to set a
     password for <literal>root</literal> using <literal>passwd</literal>.
    </para>
-  </listitem>
-  <listitem>
+  </section>
+ </section>
+ <section xml:id="sec-installation-partitioning">
+  <title>Partitioning and formatting</title>
+
+  <para>
+   The NixOS installer doesn’t do any partitioning or formatting, so you need
+   to do that yourself.
+  </para>
+
+  <para>
+   The NixOS installer ships with multiple partitioning tools. The examples
+   below use <command>parted</command>, but also provides
+   <command>fdisk</command>, <command>gdisk</command>,
+   <command>cfdisk</command>, and <command>cgdisk</command>.
+  </para>
+
+  <para>
+   The recommended partition scheme differs depending if the computer uses
+   <emphasis>Legacy Boot</emphasis> or <emphasis>UEFI</emphasis>.
+  </para>
+
+  <section xml:id="sec-installation-partitioning-UEFI">
+   <title>UEFI (GPT)</title>
+
    <para>
-    The NixOS installer doesn’t do any partitioning or formatting yet, so you
-    need to do that yourself. Use the following commands:
-    <itemizedlist>
+    Here's an example partition scheme for UEFI, using
+    <filename>/dev/sda</filename> as the device.
+    <note>
+     <para>
+      You can safely ignore <command>parted</command>'s informational message
+      about needing to update /etc/fstab.
+     </para>
+    </note>
+   </para>
+
+   <para>
+    <orderedlist>
      <listitem>
       <para>
-       For partitioning: <command>fdisk</command>.
-<screen>
-# fdisk /dev/sda # <lineannotation>(or whatever device you want to install on)</lineannotation>
--- for UEFI systems only
-> n      # <lineannotation>(create a new partition for /boot)</lineannotation>
-> 3      # <lineannotation>(make it a partition number 3)</lineannotation>
->        # <lineannotation>(press enter to accept the default)</lineannotation>
-> +512M  # <lineannotation>(the size of the UEFI boot partition)</lineannotation>
-> t      # <lineannotation>(change the partition type ...)</lineannotation>
-> 3      # <lineannotation>(... of the boot partition ...)</lineannotation>
-> 1      # <lineannotation>(... to 'UEFI System')</lineannotation>
--- for BIOS or UEFI systems
-> n      # <lineannotation>(create a new partition for /swap)</lineannotation>
-> 2      # <lineannotation>(make it a partition number 2)</lineannotation>
->        # <lineannotation>(press enter to accept the default)</lineannotation>
-> +8G    # <lineannotation>(the size of the swap partition, set to whatever you like)</lineannotation>
-> n      # <lineannotation>(create a new partition for /)</lineannotation>
-> 1      # <lineannotation>(make it a partition number 1)</lineannotation>
->        # <lineannotation>(press enter to accept the default)</lineannotation>
->        # <lineannotation>(press enter to accept the default and use the rest of the remaining space)</lineannotation>
-> a      # <lineannotation>(make the partition bootable)</lineannotation>
-> x      # <lineannotation>(enter expert mode)</lineannotation>
-> f      # <lineannotation>(fix up the partition ordering)</lineannotation>
-> r      # <lineannotation>(exit expert mode)</lineannotation>
-> w      # <lineannotation>(write the partition table to disk and exit)</lineannotation></screen>
+       Create a <emphasis>GPT</emphasis> partition table.
+<screen language="commands"># parted /dev/sda -- mklabel gpt</screen>
       </para>
      </listitem>
      <listitem>
       <para>
+       Add the <emphasis>root</emphasis> partition. This will fill the disk
+       except for the end part, where the swap will live, and the space left in
+       front (512MiB) which will be used by the boot partition.
+<screen language="commands"># parted /dev/sda -- mkpart primary 512MiB -8GiB</screen>
+      </para>
+     </listitem>
+     <listitem>
+      <para>
+       Next, add a <emphasis>swap</emphasis> partition. The size required will
+       vary according to needs, here a 8GiB one is created.
+<screen language="commands"># parted /dev/sda -- mkpart primary linux-swap -8GiB 100%</screen>
+       <note>
+        <para>
+         The swap partition size rules are no different than for other Linux
+         distributions.
+        </para>
+       </note>
+      </para>
+     </listitem>
+     <listitem>
+      <para>
+       Finally, the <emphasis>boot</emphasis> partition. NixOS by default uses
+       the ESP (EFI system partition) as its <emphasis>/boot</emphasis>
+       partition. It uses the initially reserved 512MiB at the start of the
+       disk.
+<screen language="commands"># parted /dev/sda -- mkpart ESP fat32 1MiB 512MiB
+# parted /dev/sda -- set 3 boot on</screen>
+      </para>
+     </listitem>
+    </orderedlist>
+   </para>
+
+   <para>
+    Once complete, you can follow with
+    <xref linkend="sec-installation-partitioning-formatting"/>.
+   </para>
+  </section>
+
+  <section xml:id="sec-installation-partitioning-MBR">
+   <title>Legacy Boot (MBR)</title>
+
+   <para>
+    Here's an example partition scheme for Legacy Boot, using
+    <filename>/dev/sda</filename> as the device.
+    <note>
+     <para>
+      You can safely ignore <command>parted</command>'s informational message
+      about needing to update /etc/fstab.
+     </para>
+    </note>
+   </para>
+
+   <para>
+    <orderedlist>
+     <listitem>
+      <para>
+       Create a <emphasis>MBR</emphasis> partition table.
+<screen language="commands"># parted /dev/sda -- mklabel msdos</screen>
+      </para>
+     </listitem>
+     <listitem>
+      <para>
+       Add the <emphasis>root</emphasis> partition. This will fill the the disk
+       except for the end part, where the swap will live.
+<screen language="commands"># parted /dev/sda -- mkpart primary 1MiB -8GiB</screen>
+      </para>
+     </listitem>
+     <listitem>
+      <para>
+       Finally, add a <emphasis>swap</emphasis> partition. The size required
+       will vary according to needs, here a 8GiB one is created.
+<screen language="commands"># parted /dev/sda -- mkpart primary linux-swap -8GiB 100%</screen>
+       <note>
+        <para>
+         The swap partition size rules are no different than for other Linux
+         distributions.
+        </para>
+       </note>
+      </para>
+     </listitem>
+    </orderedlist>
+   </para>
+
+   <para>
+    Once complete, you can follow with
+    <xref linkend="sec-installation-partitioning-formatting"/>.
+   </para>
+  </section>
+
+  <section xml:id="sec-installation-partitioning-formatting">
+   <title>Formatting</title>
+
+   <para>
+    Use the following commands:
+    <itemizedlist>
+     <listitem>
+      <para>
        For initialising Ext4 partitions: <command>mkfs.ext4</command>. It is
        recommended that you assign a unique symbolic label to the file system
        using the option <option>-L <replaceable>label</replaceable></option>,
@@ -169,242 +262,249 @@
      </listitem>
     </itemizedlist>
    </para>
-  </listitem>
-  <listitem>
-   <para>
-    Mount the target file system on which NixOS should be installed on
-    <filename>/mnt</filename>, e.g.
+  </section>
+ </section>
+ <section xml:id="sec-installation-installing">
+  <title>Installing</title>
+
+  <orderedlist>
+   <listitem>
+    <para>
+     Mount the target file system on which NixOS should be installed on
+     <filename>/mnt</filename>, e.g.
 <screen>
 # mount /dev/disk/by-label/nixos /mnt
 </screen>
-   </para>
-  </listitem>
-  <listitem>
-   <variablelist>
-    <varlistentry>
-     <term>
-      UEFI systems
-     </term>
-     <listitem>
-      <para>
-       Mount the boot file system on <filename>/mnt/boot</filename>, e.g.
+    </para>
+   </listitem>
+   <listitem>
+    <variablelist>
+     <varlistentry>
+      <term>
+       UEFI systems
+      </term>
+      <listitem>
+       <para>
+        Mount the boot file system on <filename>/mnt/boot</filename>, e.g.
 <screen>
 # mkdir -p /mnt/boot
 # mount /dev/disk/by-label/boot /mnt/boot
 </screen>
-      </para>
-     </listitem>
-    </varlistentry>
-   </variablelist>
-  </listitem>
-  <listitem>
-   <para>
-    If your machine has a limited amount of memory, you may want to activate
-    swap devices now (<command>swapon
-    <replaceable>device</replaceable></command>). The installer (or rather, the
-    build actions that it may spawn) may need quite a bit of RAM, depending on
-    your configuration.
+       </para>
+      </listitem>
+     </varlistentry>
+    </variablelist>
+   </listitem>
+   <listitem>
+    <para>
+     If your machine has a limited amount of memory, you may want to activate
+     swap devices now (<command>swapon
+     <replaceable>device</replaceable></command>). The installer (or rather,
+     the build actions that it may spawn) may need quite a bit of RAM,
+     depending on your configuration.
 <screen>
 # swapon /dev/sda2</screen>
-   </para>
-  </listitem>
-  <listitem>
-   <para>
-    You now need to create a file
-    <filename>/mnt/etc/nixos/configuration.nix</filename> that specifies the
-    intended configuration of the system. This is because NixOS has a
-    <emphasis>declarative</emphasis> configuration model: you create or edit a
-    description of the desired configuration of your system, and then NixOS
-    takes care of making it happen. The syntax of the NixOS configuration file
-    is described in <xref linkend="sec-configuration-syntax"/>, while a list of
-    available configuration options appears in
-    <xref
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     You now need to create a file
+     <filename>/mnt/etc/nixos/configuration.nix</filename> that specifies the
+     intended configuration of the system. This is because NixOS has a
+     <emphasis>declarative</emphasis> configuration model: you create or edit a
+     description of the desired configuration of your system, and then NixOS
+     takes care of making it happen. The syntax of the NixOS configuration file
+     is described in <xref linkend="sec-configuration-syntax"/>, while a list
+     of available configuration options appears in
+     <xref
     linkend="ch-options"/>. A minimal example is shown in
-    <xref
+     <xref
     linkend="ex-config"/>.
-   </para>
-   <para>
-    The command <command>nixos-generate-config</command> can generate an
-    initial configuration file for you:
+    </para>
+    <para>
+     The command <command>nixos-generate-config</command> can generate an
+     initial configuration file for you:
 <screen>
 # nixos-generate-config --root /mnt</screen>
-    You should then edit <filename>/mnt/etc/nixos/configuration.nix</filename>
-    to suit your needs:
+     You should then edit <filename>/mnt/etc/nixos/configuration.nix</filename>
+     to suit your needs:
 <screen>
 # nano /mnt/etc/nixos/configuration.nix
 </screen>
-    If you’re using the graphical ISO image, other editors may be available
-    (such as <command>vim</command>). If you have network access, you can also
-    install other editors — for instance, you can install Emacs by running
-    <literal>nix-env -i emacs</literal>.
-   </para>
-   <variablelist>
-    <varlistentry>
-     <term>
-      BIOS systems
-     </term>
-     <listitem>
-      <para>
-       You <emphasis>must</emphasis> set the option
-       <xref linkend="opt-boot.loader.grub.device"/> to specify on which disk
-       the GRUB boot loader is to be installed. Without it, NixOS cannot boot.
-      </para>
-     </listitem>
-    </varlistentry>
-    <varlistentry>
-     <term>
-      UEFI systems
-     </term>
-     <listitem>
-      <para>
-       You <emphasis>must</emphasis> set the option
-       <xref linkend="opt-boot.loader.systemd-boot.enable"/> to
-       <literal>true</literal>. <command>nixos-generate-config</command> should
-       do this automatically for new configurations when booted in UEFI mode.
-      </para>
-      <para>
-       You may want to look at the options starting with
-       <option><link linkend="opt-boot.loader.efi.canTouchEfiVariables">boot.loader.efi</link></option>
-       and
-       <option><link linkend="opt-boot.loader.systemd-boot.enable">boot.loader.systemd</link></option>
-       as well.
-      </para>
-     </listitem>
-    </varlistentry>
-   </variablelist>
-   <para>
-    If there are other operating systems running on the machine before
-    installing NixOS, the <xref linkend="opt-boot.loader.grub.useOSProber"/>
-    option can be set to <literal>true</literal> to automatically add them to
-    the grub menu.
-   </para>
-   <para>
-    Another critical option is <option>fileSystems</option>, specifying the
-    file systems that need to be mounted by NixOS. However, you typically
-    don’t need to set it yourself, because
-    <command>nixos-generate-config</command> sets it automatically in
-    <filename>/mnt/etc/nixos/hardware-configuration.nix</filename> from your
-    currently mounted file systems. (The configuration file
-    <filename>hardware-configuration.nix</filename> is included from
-    <filename>configuration.nix</filename> and will be overwritten by future
-    invocations of <command>nixos-generate-config</command>; thus, you
-    generally should not modify it.)
-   </para>
-   <note>
+     If you’re using the graphical ISO image, other editors may be available
+     (such as <command>vim</command>). If you have network access, you can also
+     install other editors — for instance, you can install Emacs by running
+     <literal>nix-env -i emacs</literal>.
+    </para>
+    <variablelist>
+     <varlistentry>
+      <term>
+       BIOS systems
+      </term>
+      <listitem>
+       <para>
+        You <emphasis>must</emphasis> set the option
+        <xref linkend="opt-boot.loader.grub.device"/> to specify on which disk
+        the GRUB boot loader is to be installed. Without it, NixOS cannot boot.
+       </para>
+      </listitem>
+     </varlistentry>
+     <varlistentry>
+      <term>
+       UEFI systems
+      </term>
+      <listitem>
+       <para>
+        You <emphasis>must</emphasis> set the option
+        <xref linkend="opt-boot.loader.systemd-boot.enable"/> to
+        <literal>true</literal>. <command>nixos-generate-config</command>
+        should do this automatically for new configurations when booted in UEFI
+        mode.
+       </para>
+       <para>
+        You may want to look at the options starting with
+        <option><link linkend="opt-boot.loader.efi.canTouchEfiVariables">boot.loader.efi</link></option>
+        and
+        <option><link linkend="opt-boot.loader.systemd-boot.enable">boot.loader.systemd</link></option>
+        as well.
+       </para>
+      </listitem>
+     </varlistentry>
+    </variablelist>
     <para>
-     Depending on your hardware configuration or type of file system, you may
-     need to set the option <option>boot.initrd.kernelModules</option> to
-     include the kernel modules that are necessary for mounting the root file
-     system, otherwise the installed system will not be able to boot. (If this
-     happens, boot from the CD again, mount the target file system on
-     <filename>/mnt</filename>, fix
-     <filename>/mnt/etc/nixos/configuration.nix</filename> and rerun
-     <filename>nixos-install</filename>.) In most cases,
-     <command>nixos-generate-config</command> will figure out the required
-     modules.
+     If there are other operating systems running on the machine before
+     installing NixOS, the <xref linkend="opt-boot.loader.grub.useOSProber"/>
+     option can be set to <literal>true</literal> to automatically add them to
+     the grub menu.
     </para>
-   </note>
-  </listitem>
-  <listitem>
-   <para>
-    Do the installation:
+    <para>
+     Another critical option is <option>fileSystems</option>, specifying the
+     file systems that need to be mounted by NixOS. However, you typically
+     don’t need to set it yourself, because
+     <command>nixos-generate-config</command> sets it automatically in
+     <filename>/mnt/etc/nixos/hardware-configuration.nix</filename> from your
+     currently mounted file systems. (The configuration file
+     <filename>hardware-configuration.nix</filename> is included from
+     <filename>configuration.nix</filename> and will be overwritten by future
+     invocations of <command>nixos-generate-config</command>; thus, you
+     generally should not modify it.)
+    </para>
+    <note>
+     <para>
+      Depending on your hardware configuration or type of file system, you may
+      need to set the option <option>boot.initrd.kernelModules</option> to
+      include the kernel modules that are necessary for mounting the root file
+      system, otherwise the installed system will not be able to boot. (If this
+      happens, boot from the installation media again, mount the target file
+      system on <filename>/mnt</filename>, fix
+      <filename>/mnt/etc/nixos/configuration.nix</filename> and rerun
+      <filename>nixos-install</filename>.) In most cases,
+      <command>nixos-generate-config</command> will figure out the required
+      modules.
+     </para>
+    </note>
+   </listitem>
+   <listitem>
+    <para>
+     Do the installation:
 <screen>
 # nixos-install</screen>
-    Cross fingers. If this fails due to a temporary problem (such as a network
-    issue while downloading binaries from the NixOS binary cache), you can just
-    re-run <command>nixos-install</command>. Otherwise, fix your
-    <filename>configuration.nix</filename> and then re-run
-    <command>nixos-install</command>.
-   </para>
-   <para>
-    As the last step, <command>nixos-install</command> will ask you to set the
-    password for the <literal>root</literal> user, e.g.
+     Cross fingers. If this fails due to a temporary problem (such as a network
+     issue while downloading binaries from the NixOS binary cache), you can
+     just re-run <command>nixos-install</command>. Otherwise, fix your
+     <filename>configuration.nix</filename> and then re-run
+     <command>nixos-install</command>.
+    </para>
+    <para>
+     As the last step, <command>nixos-install</command> will ask you to set the
+     password for the <literal>root</literal> user, e.g.
 <screen>
 setting root password...
 Enter new UNIX password: ***
-Retype new UNIX password: ***
-    </screen>
-    <note>
-     <para>
-      For unattended installations, it is possible to use
-      <command>nixos-install --no-root-passwd</command>
-      in order to disable the password prompt entirely.
-     </para>
-    </note>
-   </para>
-  </listitem>
-  <listitem>
-   <para>
-    If everything went well:
+Retype new UNIX password: ***</screen>
+     <note>
+      <para>
+       For unattended installations, it is possible to use
+       <command>nixos-install --no-root-passwd</command> in order to disable
+       the password prompt entirely.
+      </para>
+     </note>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     If everything went well:
 <screen>
-        # reboot</screen>
-   </para>
-  </listitem>
-  <listitem>
-   <para>
-    You should now be able to boot into the installed NixOS. The GRUB boot menu
-    shows a list of <emphasis>available configurations</emphasis> (initially
-    just one). Every time you change the NixOS configuration (see
-    <link
+# reboot</screen>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     You should now be able to boot into the installed NixOS. The GRUB boot
+     menu shows a list of <emphasis>available configurations</emphasis>
+     (initially just one). Every time you change the NixOS configuration (see
+     <link
         linkend="sec-changing-config">Changing Configuration</link>
-    ), a new item is added to the menu. This allows you to easily roll back to
-    a previous configuration if something goes wrong.
-   </para>
-   <para>
-    You should log in and change the <literal>root</literal> password with
-    <command>passwd</command>.
-   </para>
-   <para>
-    You’ll probably want to create some user accounts as well, which can be
-    done with <command>useradd</command>:
+     ), a new item is added to the menu. This allows you to easily roll back to
+     a previous configuration if something goes wrong.
+    </para>
+    <para>
+     You should log in and change the <literal>root</literal> password with
+     <command>passwd</command>.
+    </para>
+    <para>
+     You’ll probably want to create some user accounts as well, which can be
+     done with <command>useradd</command>:
 <screen>
 $ useradd -c 'Eelco Dolstra' -m eelco
 $ passwd eelco</screen>
-   </para>
-   <para>
-    You may also want to install some software. For instance,
+    </para>
+    <para>
+     You may also want to install some software. For instance,
 <screen>
 $ nix-env -qa \*</screen>
-    shows what packages are available, and
+     shows what packages are available, and
 <screen>
 $ nix-env -i w3m</screen>
-    install the <literal>w3m</literal> browser.
-   </para>
-  </listitem>
- </orderedlist>
- <para>
-  To summarise, <xref linkend="ex-install-sequence" /> shows a typical sequence
-  of commands for installing NixOS on an empty hard drive (here
-  <filename>/dev/sda</filename>). <xref linkend="ex-config"
+     install the <literal>w3m</literal> browser.
+    </para>
+   </listitem>
+  </orderedlist>
+ </section>
+ <section xml:id="sec-installation-summary">
+  <title>Installation summary</title>
+
+  <para>
+   To summarise, <xref linkend="ex-install-sequence" /> shows a typical
+   sequence of commands for installing NixOS on an empty hard drive (here
+   <filename>/dev/sda</filename>). <xref linkend="ex-config"
 /> shows a
-  corresponding configuration Nix expression.
- </para>
- <example xml:id='ex-install-sequence'>
-  <title>Commands for Installing NixOS on <filename>/dev/sda</filename></title>
-<screen>
-# fdisk /dev/sda # <lineannotation>(or whatever device you want to install on)</lineannotation>
--- for UEFI systems only
-> n      # <lineannotation>(create a new partition for /boot)</lineannotation>
-> 3      # <lineannotation>(make it a partition number 3)</lineannotation>
->        # <lineannotation>(press enter to accept the default)</lineannotation>
-> +512M  # <lineannotation>(the size of the UEFI boot partition)</lineannotation>
-> t      # <lineannotation>(change the partition type ...)</lineannotation>
-> 3      # <lineannotation>(... of the boot partition ...)</lineannotation>
-> 1      # <lineannotation>(... to 'UEFI System')</lineannotation>
--- for BIOS or UEFI systems
-> n      # <lineannotation>(create a new partition for /swap)</lineannotation>
-> 2      # <lineannotation>(make it a partition number 2)</lineannotation>
->        # <lineannotation>(press enter to accept the default)</lineannotation>
-> +8G    # <lineannotation>(the size of the swap partition)</lineannotation>
-> n      # <lineannotation>(create a new partition for /)</lineannotation>
-> 1      # <lineannotation>(make it a partition number 1)</lineannotation>
->        # <lineannotation>(press enter to accept the default)</lineannotation>
->        # <lineannotation>(press enter to accept the default and use the rest of the remaining space)</lineannotation>
-> a      # <lineannotation>(make the partition bootable)</lineannotation>
-> x      # <lineannotation>(enter expert mode)</lineannotation>
-> f      # <lineannotation>(fix up the partition ordering)</lineannotation>
-> r      # <lineannotation>(exit expert mode)</lineannotation>
-> w      # <lineannotation>(write the partition table to disk and exit)</lineannotation>
+   corresponding configuration Nix expression.
+  </para>
+
+  <example xml:id="ex-partition-scheme-MBR">
+   <title>Example partition schemes for NixOS on <filename>/dev/sda</filename> (MBR)</title>
+<screen language="commands">
+# parted /dev/sda -- mklabel msdos
+# parted /dev/sda -- mkpart primary 1MiB -8GiB
+# parted /dev/sda -- mkpart primary linux-swap -8GiB 100%</screen>
+  </example>
+
+  <example xml:id="ex-partition-scheme-UEFI">
+   <title>Example partition schemes for NixOS on <filename>/dev/sda</filename> (UEFI)</title>
+<screen language="commands">
+# parted /dev/sda -- mklabel gpt
+# parted /dev/sda -- mkpart primary 512MiB -8GiB
+# parted /dev/sda -- mkpart primary linux-swap -8GiB 100%
+# parted /dev/sda -- mkpart ESP fat32 1MiB 512MiB
+# parted /dev/sda -- set 3 boot on</screen>
+  </example>
+
+  <example xml:id="ex-install-sequence">
+   <title>Commands for Installing NixOS on <filename>/dev/sda</filename></title>
+   <para>
+    With a partitioned disk.
+<screen language="commands">
 # mkfs.ext4 -L nixos /dev/sda1
 # mkswap -L swap /dev/sda2
 # swapon /dev/sda2
@@ -416,9 +516,11 @@ $ nix-env -i w3m</screen>
 # nano /mnt/etc/nixos/configuration.nix
 # nixos-install
 # reboot</screen>
- </example>
- <example xml:id='ex-config'>
-  <title>NixOS Configuration</title>
+   </para>
+  </example>
+
+  <example xml:id='ex-config'>
+   <title>NixOS Configuration</title>
 <screen>
 { config, pkgs, ... }: {
   imports = [
@@ -438,10 +540,19 @@ $ nix-env -i w3m</screen>
   services.sshd.enable = true;
 }
   </screen>
- </example>
- <xi:include href="installing-usb.xml" />
- <xi:include href="installing-pxe.xml" />
- <xi:include href="installing-virtualbox-guest.xml" />
- <xi:include href="installing-from-other-distro.xml" />
- <xi:include href="installing-behind-a-proxy.xml" />
+  </example>
+ </section>
+ <section xml:id="sec-installation-additional-notes">
+  <title>Additional installation notes</title>
+
+  <xi:include href="installing-usb.xml" />
+
+  <xi:include href="installing-pxe.xml" />
+
+  <xi:include href="installing-virtualbox-guest.xml" />
+
+  <xi:include href="installing-from-other-distro.xml" />
+
+  <xi:include href="installing-behind-a-proxy.xml" />
+ </section>
 </chapter>
diff --git a/nixos/doc/manual/manual.xml b/nixos/doc/manual/manual.xml
index a5efde32885c..12f52e1997c8 100644
--- a/nixos/doc/manual/manual.xml
+++ b/nixos/doc/manual/manual.xml
@@ -17,8 +17,8 @@
   <para>
    If you encounter problems, please report them on the
    <literal
-    xlink:href="https://discourse.nixos.org">Discourse</literal>
-   or on the <link
+    xlink:href="https://discourse.nixos.org">Discourse</literal> or
+   on the <link
     xlink:href="irc://irc.freenode.net/#nixos">
    <literal>#nixos</literal> channel on Freenode</link>. Bugs should be
    reported in
diff --git a/nixos/doc/manual/release-notes/rl-1509.xml b/nixos/doc/manual/release-notes/rl-1509.xml
index 4eb2f9aa0a95..e500c9d63422 100644
--- a/nixos/doc/manual/release-notes/rl-1509.xml
+++ b/nixos/doc/manual/release-notes/rl-1509.xml
@@ -435,11 +435,11 @@ system.autoUpgrade.enable = true;
 <programlisting>
 system.stateVersion = "14.12";
 </programlisting>
-     The new option <option>system.stateVersion</option> ensures that
-     certain configuration changes that could break existing systems (such as
-     the <command>sshd</command> host key setting) will maintain compatibility
-     with the specified NixOS release. NixOps sets the state version of
-     existing deployments automatically.
+     The new option <option>system.stateVersion</option> ensures that certain
+     configuration changes that could break existing systems (such as the
+     <command>sshd</command> host key setting) will maintain compatibility with
+     the specified NixOS release. NixOps sets the state version of existing
+     deployments automatically.
     </para>
    </listitem>
    <listitem>
diff --git a/nixos/doc/manual/release-notes/rl-1809.xml b/nixos/doc/manual/release-notes/rl-1809.xml
index 5a565f08b2cb..c5521735428b 100644
--- a/nixos/doc/manual/release-notes/rl-1809.xml
+++ b/nixos/doc/manual/release-notes/rl-1809.xml
@@ -3,7 +3,7 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="sec-release-18.09">
- <title>Release 18.09 (“Jellyfish”, 2018/09/??)</title>
+ <title>Release 18.09 (“Jellyfish”, 2018/10/05)</title>
 
  <section xmlns="http://docbook.org/ns/docbook"
          xmlns:xlink="http://www.w3.org/1999/xlink"
@@ -14,18 +14,56 @@
 
   <para>
    In addition to numerous new and upgraded packages, this release has the
-   following highlights:
+   following notable updates:
   </para>
 
   <itemizedlist>
    <listitem>
-     <para>
-       Support for wrapping binaries using <literal>firejail</literal> has been
-       added through <varname>programs.firejail.wrappedBinaries</varname>.
-     </para>
-     <para>
-       For example
-     </para>
+    <para>
+     End of support is planned for end of April 2019, handing over to 19.03.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Platform support: x86_64-linux and x86_64-darwin as always. Support for
+     aarch64-linux is as with the previous releases, not equivalent to the
+     x86-64-linux release, but with efforts to reach parity.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Nix has been updated to 2.1; see its
+     <link xlink:href="https://nixos.org/nix/manual/#ssec-relnotes-2.1">release
+     notes</link>.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Core versions: linux: 4.14 LTS (unchanged), glibc: 2.26 → 2.27, gcc: 7
+     (unchanged), systemd: 237 → 239.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Desktop version changes: gnome: 3.26 → 3.28, (KDE) plasma-desktop: 5.12
+     → 5.13.
+    </para>
+   </listitem>
+  </itemizedlist>
+
+  <para>
+   Notable changes and additions for 18.09 include:
+  </para>
+
+  <itemizedlist>
+   <listitem>
+    <para>
+     Support for wrapping binaries using <literal>firejail</literal> has been
+     added through <varname>programs.firejail.wrappedBinaries</varname>.
+    </para>
+    <para>
+     For example
+    </para>
 <programlisting>
 programs.firejail = {
   enable = true;
@@ -35,9 +73,10 @@ programs.firejail = {
   };
 };
 </programlisting>
-      <para>
-        This will place <literal>firefox</literal> and <literal>mpv</literal> binaries in the global path wrapped by firejail.
-      </para>
+    <para>
+     This will place <literal>firefox</literal> and <literal>mpv</literal>
+     binaries in the global path wrapped by firejail.
+    </para>
    </listitem>
    <listitem>
     <para>
@@ -69,22 +108,26 @@ $ nix-instantiate -E '(import &lt;nixpkgsunstable&gt; {}).gitFull'
   <title>New Services</title>
 
   <para>
-   The following new services were added since the last release:
+   A curated selection of new services that were added since the last release:
   </para>
 
   <itemizedlist>
    <listitem>
     <para>
-     The <varname>services.cassandra</varname> module has been reworked and
-     was rewritten from scratch. The service has succeeding tests for
-     the versions 2.1, 2.2, 3.0 and 3.11 of <link
-     xlink:href="https://cassandra.apache.org/">Apache Cassandra</link>.
+     The <varname>services.cassandra</varname> module has been reworked and was
+     rewritten from scratch. The service has succeeding tests for the versions
+     2.1, 2.2, 3.0 and 3.11 of
+     <link
+     xlink:href="https://cassandra.apache.org/">Apache
+     Cassandra</link>.
     </para>
    </listitem>
    <listitem>
     <para>
-     There is a new <varname>services.foundationdb</varname> module for deploying
-     <link xlink:href="https://www.foundationdb.org">FoundationDB</link> clusters.
+     There is a new <varname>services.foundationdb</varname> module for
+     deploying
+     <link xlink:href="https://www.foundationdb.org">FoundationDB</link>
+     clusters.
     </para>
    </listitem>
    <listitem>
@@ -97,24 +140,323 @@ $ nix-instantiate -E '(import &lt;nixpkgsunstable&gt; {}).gitFull'
    </listitem>
    <listitem>
     <para>
-      <varname>services.strongswan-swanctl</varname>
-      is a modern replacement for <varname>services.strongswan</varname>.
-      You can use either one of them to setup IPsec VPNs but not both at the same time.
+     <varname>services.strongswan-swanctl</varname> is a modern replacement for
+     <varname>services.strongswan</varname>. You can use either one of them to
+     setup IPsec VPNs but not both at the same time.
     </para>
     <para>
-      <varname>services.strongswan-swanctl</varname> uses the
-      <link xlink:href="https://wiki.strongswan.org/projects/strongswan/wiki/swanctl">swanctl</link>
-      command which uses the modern
-      <link xlink:href="https://github.com/strongswan/strongswan/blob/master/src/libcharon/plugins/vici/README.md">vici</link>
-      <emphasis>Versatile IKE Configuration Interface</emphasis>.
-      The deprecated <literal>ipsec</literal> command used in <varname>services.strongswan</varname> is using the legacy
-      <link xlink:href="https://github.com/strongswan/strongswan/blob/master/README_LEGACY.md">stroke configuration interface</link>.
+     <varname>services.strongswan-swanctl</varname> uses the
+     <link xlink:href="https://wiki.strongswan.org/projects/strongswan/wiki/swanctl">swanctl</link>
+     command which uses the modern
+     <link xlink:href="https://github.com/strongswan/strongswan/blob/master/src/libcharon/plugins/vici/README.md">vici</link>
+     <emphasis>Versatile IKE Configuration Interface</emphasis>. The deprecated
+     <literal>ipsec</literal> command used in
+     <varname>services.strongswan</varname> is using the legacy
+     <link xlink:href="https://github.com/strongswan/strongswan/blob/master/README_LEGACY.md">stroke
+     configuration interface</link>.
     </para>
    </listitem>
    <listitem>
     <para>
-      The new <varname>services.elasticsearch-curator</varname> service
-      periodically curates or manages, your Elasticsearch indices and snapshots.
+     The new <varname>services.elasticsearch-curator</varname> service
+     periodically curates or manages, your Elasticsearch indices and snapshots.
+    </para>
+   </listitem>
+  </itemizedlist>
+
+  <para>
+   Every new services:
+  </para>
+
+  <itemizedlist>
+   <listitem>
+    <para>
+     <literal>./config/xdg/autostart.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./config/xdg/icons.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./config/xdg/menus.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./config/xdg/mime.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./hardware/brightnessctl.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./hardware/onlykey.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./hardware/video/uvcvideo/default.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./misc/documentation.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./programs/firejail.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./programs/iftop.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./programs/sedutil.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./programs/singularity.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./programs/xss-lock.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./programs/zsh/zsh-autosuggestions.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/admin/oxidized.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/backup/duplicati.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/backup/restic.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/backup/restic-rest-server.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/cluster/hadoop/default.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/databases/aerospike.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/databases/monetdb.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/desktops/bamf.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/desktops/flatpak.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/desktops/zeitgeist.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/development/bloop.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/development/jupyter/default.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/hardware/lcd.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/hardware/undervolt.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/misc/clipmenu.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/misc/gitweb.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/misc/serviio.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/misc/safeeyes.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/misc/sysprof.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/misc/weechat.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/monitoring/datadog-agent.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/monitoring/incron.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/networking/dnsdist.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/networking/freeradius.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/networking/hans.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/networking/morty.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/networking/ndppd.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/networking/ocserv.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/networking/owamp.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/networking/quagga.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/networking/shadowsocks.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/networking/stubby.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/networking/zeronet.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/security/certmgr.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/security/cfssl.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/security/oauth2_proxy_nginx.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/web-apps/virtlyst.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/web-apps/youtrack.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/web-servers/hitch/default.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/web-servers/hydron.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/web-servers/meguca.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./services/web-servers/nginx/gitweb.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./virtualisation/kvmgt.nix</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     <literal>./virtualisation/qemu-guest-agent.nix</literal>
     </para>
    </listitem>
   </itemizedlist>
@@ -135,8 +477,8 @@ $ nix-instantiate -E '(import &lt;nixpkgsunstable&gt; {}).gitFull'
   <itemizedlist>
    <listitem>
     <para>
-     The deprecated <varname>services.cassandra</varname> module has
-     seen a complete rewrite. (See above.)
+     The deprecated <varname>services.cassandra</varname> module has seen a
+     complete rewrite. (See above.)
     </para>
    </listitem>
    <listitem>
@@ -186,41 +528,44 @@ $ nix-instantiate -E '(import &lt;nixpkgsunstable&gt; {}).gitFull'
    </listitem>
    <listitem>
     <para>
-     <varname>services.munge</varname> now runs as user (and group) <literal>munge</literal> instead of root.
-     Make sure the key file is accessible to the daemon.
+     <varname>services.munge</varname> now runs as user (and group)
+     <literal>munge</literal> instead of root. Make sure the key file is
+     accessible to the daemon.
     </para>
    </listitem>
    <listitem>
     <para>
-      <varname>dockerTools.buildImage</varname> now uses <literal>null</literal> as default value for <varname>tag</varname>,
-      which indicates that the nix output hash will be used as tag.
+     <varname>dockerTools.buildImage</varname> now uses <literal>null</literal>
+     as default value for <varname>tag</varname>, which indicates that the nix
+     output hash will be used as tag.
     </para>
    </listitem>
    <listitem>
     <para>
-     The ELK stack: <varname>elasticsearch</varname>, <varname>logstash</varname> and <varname>kibana</varname>
-     has been upgraded from 2.* to 6.3.*.
-     The 2.* versions have been <link xlink:href="https://www.elastic.co/support/eol">unsupported since last year</link>
-     so they have been removed. You can still use the 5.* versions under the names
-     <varname>elasticsearch5</varname>, <varname>logstash5</varname> and
-     <varname>kibana5</varname>.
+     The ELK stack: <varname>elasticsearch</varname>,
+     <varname>logstash</varname> and <varname>kibana</varname> has been
+     upgraded from 2.* to 6.3.*. The 2.* versions have been
+     <link xlink:href="https://www.elastic.co/support/eol">unsupported since
+     last year</link> so they have been removed. You can still use the 5.*
+     versions under the names <varname>elasticsearch5</varname>,
+     <varname>logstash5</varname> and <varname>kibana5</varname>.
     </para>
     <para>
-     The elastic beats:
-     <varname>filebeat</varname>, <varname>heartbeat</varname>,
-     <varname>metricbeat</varname> and <varname>packetbeat</varname>
-     have had the same treatment: they now target 6.3.* as well.
-     The 5.* versions are available under the names:
+     The elastic beats: <varname>filebeat</varname>,
+     <varname>heartbeat</varname>, <varname>metricbeat</varname> and
+     <varname>packetbeat</varname> have had the same treatment: they now target
+     6.3.* as well. The 5.* versions are available under the names:
      <varname>filebeat5</varname>, <varname>heartbeat5</varname>,
      <varname>metricbeat5</varname> and <varname>packetbeat5</varname>
     </para>
     <para>
      The ELK-6.3 stack now comes with
-     <link xlink:href="https://www.elastic.co/products/x-pack/open">X-Pack by default</link>.
-     Since X-Pack is licensed under the
-     <link xlink:href="https://github.com/elastic/elasticsearch/blob/master/licenses/ELASTIC-LICENSE.txt">Elastic License</link>
-     the ELK packages now have an unfree license. To use them you need to specify
-     <literal>allowUnfree = true;</literal> in your nixpkgs configuration.
+     <link xlink:href="https://www.elastic.co/products/x-pack/open">X-Pack by
+     default</link>. Since X-Pack is licensed under the
+     <link xlink:href="https://github.com/elastic/elasticsearch/blob/master/licenses/ELASTIC-LICENSE.txt">Elastic
+     License</link> the ELK packages now have an unfree license. To use them
+     you need to specify <literal>allowUnfree = true;</literal> in your nixpkgs
+     configuration.
     </para>
     <para>
      Fortunately there is also a free variant of the ELK stack without X-Pack.
@@ -231,20 +576,23 @@ $ nix-instantiate -E '(import &lt;nixpkgsunstable&gt; {}).gitFull'
    </listitem>
    <listitem>
     <para>
-      Options
-      <literal>boot.initrd.luks.devices.<replaceable>name</replaceable>.yubikey.ramfsMountPoint</literal>
-      <literal>boot.initrd.luks.devices.<replaceable>name</replaceable>.yubikey.storage.mountPoint</literal>
-      were removed. <literal>luksroot.nix</literal> module never supported more than one YubiKey at
-      a time anyway, hence those options never had any effect. You should be able to remove them
-      from your config without any issues.
+     Options
+     <literal>boot.initrd.luks.devices.<replaceable>name</replaceable>.yubikey.ramfsMountPoint</literal>
+     <literal>boot.initrd.luks.devices.<replaceable>name</replaceable>.yubikey.storage.mountPoint</literal>
+     were removed. <literal>luksroot.nix</literal> module never supported more
+     than one YubiKey at a time anyway, hence those options never had any
+     effect. You should be able to remove them from your config without any
+     issues.
     </para>
    </listitem>
    <listitem>
     <para>
-      <literal>stdenv.system</literal> and <literal>system</literal> in nixpkgs now refer to the host platform instead of the build platform.
-      For native builds this is not change, let alone a breaking one.
-      For cross builds, it is a breaking change, and <literal>stdenv.buildPlatform.system</literal> can be used instead for the old behavior.
-      They should be using that anyways for clarity.
+     <literal>stdenv.system</literal> and <literal>system</literal> in nixpkgs
+     now refer to the host platform instead of the build platform. For native
+     builds this is not change, let alone a breaking one. For cross builds, it
+     is a breaking change, and <literal>stdenv.buildPlatform.system</literal>
+     can be used instead for the old behavior. They should be using that
+     anyways for clarity.
     </para>
    </listitem>
   </itemizedlist>
@@ -298,26 +646,33 @@ $ nix-instantiate -E '(import &lt;nixpkgsunstable&gt; {}).gitFull'
    </listitem>
    <listitem>
     <para>
-      The <literal>pkgs</literal> argument to NixOS modules can now be set directly using <literal>nixpkgs.pkgs</literal>. Previously, only the <literal>system</literal>, <literal>config</literal> and <literal>overlays</literal> arguments could be used to influence <literal>pkgs</literal>.
+     The <literal>pkgs</literal> argument to NixOS modules can now be set
+     directly using <literal>nixpkgs.pkgs</literal>. Previously, only the
+     <literal>system</literal>, <literal>config</literal> and
+     <literal>overlays</literal> arguments could be used to influence
+     <literal>pkgs</literal>.
     </para>
    </listitem>
    <listitem>
     <para>
-      A NixOS system can now be constructed more easily based on a preexisting invocation of Nixpkgs. For example:
-      <programlisting>
+     A NixOS system can now be constructed more easily based on a preexisting
+     invocation of Nixpkgs. For example:
+<programlisting>
 inherit (pkgs.nixos {
   boot.loader.grub.enable = false;
   fileSystems."/".device = "/dev/xvda1";
 }) toplevel kernel initialRamdisk manual;
       </programlisting>
-
-      This benefits evaluation performance, lets you write Nixpkgs packages that depend on NixOS images and is consistent with a deployment architecture that would be centered around Nixpkgs overlays.
+     This benefits evaluation performance, lets you write Nixpkgs packages that
+     depend on NixOS images and is consistent with a deployment architecture
+     that would be centered around Nixpkgs overlays.
     </para>
    </listitem>
    <listitem>
     <para>
-      <literal>lib.traceValIfNot</literal> has been deprecated. Use
-      <literal>if/then/else</literal> and <literal>lib.traceValSeq</literal> instead.
+     <literal>lib.traceValIfNot</literal> has been deprecated. Use
+     <literal>if/then/else</literal> and <literal>lib.traceValSeq</literal>
+     instead.
     </para>
    </listitem>
    <listitem>
@@ -336,9 +691,9 @@ inherit (pkgs.nixos {
    </listitem>
    <listitem>
     <para>
-     <literal>lib.recursiveUpdateUntil</literal> was not acting according to its
-     specification. It has been fixed to act according to the docstring, and a
-     test has been added.
+     <literal>lib.recursiveUpdateUntil</literal> was not acting according to
+     its specification. It has been fixed to act according to the docstring,
+     and a test has been added.
     </para>
    </listitem>
    <listitem>
@@ -408,11 +763,11 @@ inherit (pkgs.nixos {
     </para>
    </listitem>
    <listitem>
-     <para>
-     The Kubernetes package has been bumped to major version 1.11.
-     Please consult the
-     <link xlink:href="https://github.com/kubernetes/kubernetes/blob/release-1.11/CHANGELOG-1.11.md">release notes</link>
-     for details on new features and api changes.
+    <para>
+     The Kubernetes package has been bumped to major version 1.11. Please
+     consult the
+     <link xlink:href="https://github.com/kubernetes/kubernetes/blob/release-1.11/CHANGELOG-1.11.md">release
+     notes</link> for details on new features and api changes.
     </para>
    </listitem>
    <listitem>
@@ -432,8 +787,8 @@ inherit (pkgs.nixos {
    </listitem>
    <listitem>
     <para>
-     The option <varname>services.kubernetes.apiserver.address</varname>
-     was renamed to <varname>services.kubernetes.apiserver.bindAddress</varname>.
+     The option <varname>services.kubernetes.apiserver.address</varname> was
+     renamed to <varname>services.kubernetes.apiserver.bindAddress</varname>.
      Note that the default value has changed from 127.0.0.1 to 0.0.0.0.
     </para>
    </listitem>
@@ -445,76 +800,86 @@ inherit (pkgs.nixos {
    </listitem>
    <listitem>
     <para>
-     The option <varname>services.kubernetes.addons.dashboard.enableRBAC</varname>
-     was renamed to <varname>services.kubernetes.addons.dashboard.rbac.enable</varname>.
+     The option
+     <varname>services.kubernetes.addons.dashboard.enableRBAC</varname> was
+     renamed to
+     <varname>services.kubernetes.addons.dashboard.rbac.enable</varname>.
     </para>
    </listitem>
    <listitem>
     <para>
      The Kubernetes Dashboard now has only minimal RBAC permissions by default.
-     If dashboard cluster-admin rights are desired,
-     set <varname>services.kubernetes.addons.dashboard.rbac.clusterAdmin</varname> to true.
-     On existing clusters, in order for the revocation of privileges to take effect,
-     the current ClusterRoleBinding for kubernetes-dashboard must be manually removed:
-     <literal>kubectl delete clusterrolebinding kubernetes-dashboard</literal>
+     If dashboard cluster-admin rights are desired, set
+     <varname>services.kubernetes.addons.dashboard.rbac.clusterAdmin</varname>
+     to true. On existing clusters, in order for the revocation of privileges
+     to take effect, the current ClusterRoleBinding for kubernetes-dashboard
+     must be manually removed: <literal>kubectl delete clusterrolebinding
+     kubernetes-dashboard</literal>
     </para>
    </listitem>
    <listitem>
     <para>
      The <varname>programs.screen</varname> module provides allows to configure
-     <literal>/etc/screenrc</literal>, however the module behaved fairly counterintuitive as
-     the config exists, but the package wasn't available. Since 18.09 <literal>pkgs.screen</literal>
-     will be added to <literal>environment.systemPackages</literal>.
+     <literal>/etc/screenrc</literal>, however the module behaved fairly
+     counterintuitive as the config exists, but the package wasn't available.
+     Since 18.09 <literal>pkgs.screen</literal> will be added to
+     <literal>environment.systemPackages</literal>.
     </para>
    </listitem>
    <listitem>
     <para>
-      The module <option>services.networking.hostapd</option> now uses WPA2 by default.
+     The module <option>services.networking.hostapd</option> now uses WPA2 by
+     default.
     </para>
    </listitem>
    <listitem>
     <para>
-      <varname>s6Dns</varname>, <varname>s6Networking</varname>,
-      <varname>s6LinuxUtils</varname> and <varname>s6PortableUtils</varname>
-      renamed to
-      <varname>s6-dns</varname>, <varname>s6-networking</varname>,
-      <varname>s6-linux-utils</varname> and <varname>s6-portable-utils</varname> respectively.
+     <varname>s6Dns</varname>, <varname>s6Networking</varname>,
+     <varname>s6LinuxUtils</varname> and <varname>s6PortableUtils</varname>
+     renamed to <varname>s6-dns</varname>, <varname>s6-networking</varname>,
+     <varname>s6-linux-utils</varname> and <varname>s6-portable-utils</varname>
+     respectively.
     </para>
-  </listitem>
-  <listitem>
+   </listitem>
+   <listitem>
     <para>
-      The module option <option>nix.useSandbox</option> is now defaulted to <literal>true</literal>.
+     The module option <option>nix.useSandbox</option> is now defaulted to
+     <literal>true</literal>.
     </para>
-  </listitem>
-  <listitem>
+   </listitem>
+   <listitem>
     <para>
-      The config activation script of <literal>nixos-rebuild</literal> now
-      <link xlink:href="https://www.freedesktop.org/software/systemd/man/systemctl.html#Manager%20Lifecycle%20Commands">reloads</link>
-      all user units for each authenticated user.
+     The config activation script of <literal>nixos-rebuild</literal> now
+     <link xlink:href="https://www.freedesktop.org/software/systemd/man/systemctl.html#Manager%20Lifecycle%20Commands">reloads</link>
+     all user units for each authenticated user.
     </para>
-  </listitem>
-  <listitem>
+   </listitem>
+   <listitem>
     <para>
-      The default display manager is now LightDM.
-      To use SLiM set <literal>services.xserver.displayManager.slim.enable</literal>
-      to <literal>true</literal>.
+     The default display manager is now LightDM. To use SLiM set
+     <literal>services.xserver.displayManager.slim.enable</literal> to
+     <literal>true</literal>.
     </para>
-  </listitem>
-  <listitem>
+   </listitem>
+   <listitem>
     <para>
-      NixOS option descriptions are now automatically broken up into individual
-      paragraphs if the text contains two consecutive newlines, so it's no
-      longer necessary to use <code>&lt;/para&gt;&lt;para&gt;</code> to start
-      a new paragraph.
+     NixOS option descriptions are now automatically broken up into individual
+     paragraphs if the text contains two consecutive newlines, so it's no
+     longer necessary to use <code>&lt;/para&gt;&lt;para&gt;</code> to start a
+     new paragraph.
     </para>
-  </listitem>
-  <listitem>
+   </listitem>
+   <listitem>
     <para>
-      Top-level <literal>buildPlatform</literal>, <literal>hostPlatform</literal>, and <literal>targetPlatform</literal> in Nixpkgs are deprecated.
-      Please use their equivalents in <literal>stdenv</literal> instead:
-      <literal>stdenv.buildPlatform</literal>, <literal>stdenv.hostPlatform</literal>, and <literal>stdenv.targetPlatform</literal>.
+     Top-level <literal>buildPlatform</literal>,
+     <literal>hostPlatform</literal>, and <literal>targetPlatform</literal> in
+     Nixpkgs are deprecated. Please use their equivalents in
+     <literal>stdenv</literal> instead:
+     <literal>stdenv.buildPlatform</literal>,
+     <literal>stdenv.hostPlatform</literal>, and
+     <literal>stdenv.targetPlatform</literal>.
     </para>
-  </listitem>
+   </listitem>
   </itemizedlist>
  </section>
 </section>
diff --git a/nixos/doc/manual/release-notes/rl-1903.xml b/nixos/doc/manual/release-notes/rl-1903.xml
index 3e7f8d0681d2..9cb5b93f27cb 100644
--- a/nixos/doc/manual/release-notes/rl-1903.xml
+++ b/nixos/doc/manual/release-notes/rl-1903.xml
@@ -100,8 +100,17 @@
     </itemizedlist>
    </listitem>
    <listitem>
+    <para>
+     Package <varname>rabbitmq_server</varname> is renamed to
+     <varname>rabbitmq-server</varname>.
+    </para>
+   </listitem>
+   <listitem>
      <para>
-       Package <varname>rabbitmq_server</varname> is renamed to <varname>rabbitmq-server</varname>.
+       The <literal>light</literal> module no longer uses setuid binaries, but
+       udev rules. As a consequence users of that module have to belong to the
+       <literal>video</literal> group in order to use the executable
+       (i.e. <literal>users.users.yourusername.extraGroups = ["video"];</literal>).
      </para>
    </listitem>
   </itemizedlist>
diff --git a/nixos/lib/test-driver/Machine.pm b/nixos/lib/test-driver/Machine.pm
index b18f48464cee..a00fe25c2b8e 100644
--- a/nixos/lib/test-driver/Machine.pm
+++ b/nixos/lib/test-driver/Machine.pm
@@ -155,8 +155,10 @@ sub start {
         $ENV{USE_TMPDIR} = 1;
         $ENV{QEMU_OPTS} =
             ($self->{allowReboot} ? "" : "-no-reboot ") .
-            "-monitor unix:./monitor -chardev socket,id=shell,path=./shell " .
-            "-device virtio-serial -device virtconsole,chardev=shell " .
+            "-monitor unix:./monitor " .
+            "-chardev socket,id=shell,path=./shell -device virtio-serial -device virtconsole,chardev=shell " .
+            # socket backdoor, see "Debugging NixOS tests" section in NixOS manual
+            "-chardev socket,id=backdoor,path=./backdoor,server,nowait -device virtio-serial -device virtconsole,chardev=backdoor " .
             "-device virtio-rng-pci " .
             ($showGraphics ? "-serial stdio" : "-nographic") . " " . ($ENV{QEMU_OPTS} || "");
         chdir $self->{stateDir} or die;
diff --git a/nixos/modules/hardware/opengl.nix b/nixos/modules/hardware/opengl.nix
index b371af353cf9..46d06d71333a 100644
--- a/nixos/modules/hardware/opengl.nix
+++ b/nixos/modules/hardware/opengl.nix
@@ -129,17 +129,17 @@ in
       message = "Option driSupport32Bit only makes sense on a 64-bit system.";
     };
 
-    system.activationScripts.setup-opengl =
-      ''
-        ln -sfn ${package} /run/opengl-driver
-        ${if pkgs.stdenv.isi686 then ''
-          ln -sfn opengl-driver /run/opengl-driver-32
-        '' else if cfg.driSupport32Bit then ''
-          ln -sfn ${package32} /run/opengl-driver-32
-        '' else ''
-          rm -f /run/opengl-driver-32
-        ''}
-      '';
+    systemd.tmpfiles.rules = [
+      "L+ /run/opengl-driver - - - - ${package}"
+      (
+        if pkgs.stdenv.isi686 then
+          "L+ /run/opengl-driver-32 - - - - opengl-driver"
+        else if cfg.driSupport32Bit then
+          "L+ /run/opengl-driver-32 - - - - ${package32}"
+        else
+          "r /run/opengl-driver-32"
+      )
+    ];
 
     environment.sessionVariables.LD_LIBRARY_PATH =
       [ "/run/opengl-driver/lib" ] ++ optional cfg.driSupport32Bit "/run/opengl-driver-32/lib";
diff --git a/nixos/modules/hardware/steam-hardware.nix b/nixos/modules/hardware/steam-hardware.nix
new file mode 100644
index 000000000000..378aeffe71b5
--- /dev/null
+++ b/nixos/modules/hardware/steam-hardware.nix
@@ -0,0 +1,25 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.hardware.steam-hardware;
+
+in
+
+{
+  options.hardware.steam-hardware = {
+    enable = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Enable udev rules for Steam hardware such as the Steam Controller, other supported controllers and the HTC Vive";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.udev.packages = [
+      pkgs.steamPackages.steam
+    ];
+  };
+}
diff --git a/nixos/modules/hardware/video/nvidia.nix b/nixos/modules/hardware/video/nvidia.nix
index eb1952280331..6944d1a4f76b 100644
--- a/nixos/modules/hardware/video/nvidia.nix
+++ b/nixos/modules/hardware/video/nvidia.nix
@@ -26,9 +26,73 @@ let
   nvidia_libs32 = (nvidiaForKernel pkgs_i686.linuxPackages).override { libsOnly = true; kernel = null; };
 
   enabled = nvidia_x11 != null;
+
+  cfg = config.hardware.nvidia;
+  optimusCfg = cfg.optimus_prime;
 in
 
 {
+  options = {
+    hardware.nvidia.modesetting.enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = ''
+        Enable kernel modesetting when using the NVIDIA proprietary driver.
+
+        Enabling this fixes screen tearing when using Optimus via PRIME (see
+        <option>hardware.nvidia.optimus_prime.enable</option>. This is not enabled
+        by default because it is not officially supported by NVIDIA and would not
+        work with SLI.
+      '';
+    };
+
+    hardware.nvidia.optimus_prime.enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = ''
+        Enable NVIDIA Optimus support using the NVIDIA proprietary driver via PRIME.
+        If enabled, the NVIDIA GPU will be always on and used for all rendering,
+        while enabling output to displays attached only to the integrated Intel GPU
+        without a multiplexer.
+
+        Note that this option only has any effect if the "nvidia" driver is specified
+        in <option>services.xserver.videoDrivers</option>, and it should preferably
+        be the only driver there.
+
+        If this is enabled, then the bus IDs of the NVIDIA and Intel GPUs have to be
+        specified (<option>hardware.nvidia.optimus_prime.nvidiaBusId</option> and
+        <option>hardware.nvidia.optimus_prime.intelBusId</option>).
+
+        If you enable this, you may want to also enable kernel modesetting for the
+        NVIDIA driver (<option>hardware.nvidia.modesetting.enable</option>) in order
+        to prevent tearing.
+
+        Note that this configuration will only be successful when a display manager
+        for which the <option>services.xserver.displayManager.setupCommands</option>
+        option is supported is used; notably, SLiM is not supported.
+      '';
+    };
+
+    hardware.nvidia.optimus_prime.nvidiaBusId = lib.mkOption {
+      type = lib.types.string;
+      default = "";
+      example = "PCI:1:0:0";
+      description = ''
+        Bus ID of the NVIDIA GPU. You can find it using lspci; for example if lspci
+        shows the NVIDIA GPU at "01:00.0", set this option to "PCI:1:0:0".
+      '';
+    };
+
+    hardware.nvidia.optimus_prime.intelBusId = lib.mkOption {
+      type = lib.types.string;
+      default = "";
+      example = "PCI:0:2:0";
+      description = ''
+        Bus ID of the Intel GPU. You can find it using lspci; for example if lspci
+        shows the Intel GPU at "00:02.0", set this option to "PCI:0:2:0".
+      '';
+    };
+  };
 
   config = mkIf enabled {
     assertions = [
@@ -36,16 +100,62 @@ in
         assertion = config.services.xserver.displayManager.gdm.wayland;
         message = "NVidia drivers don't support wayland";
       }
+      {
+        assertion = !optimusCfg.enable ||
+          (optimusCfg.nvidiaBusId != "" && optimusCfg.intelBusId != "");
+        message = ''
+          When NVIDIA Optimus via PRIME is enabled, the GPU bus IDs must configured.
+        '';
+      }
     ];
 
-    services.xserver.drivers = singleton
-      { name = "nvidia"; modules = [ nvidia_x11.bin ]; libPath = [ nvidia_x11 ]; };
+    # If Optimus/PRIME is enabled, we:
+    # - Specify the configured NVIDIA GPU bus ID in the Device section for the
+    #   "nvidia" driver.
+    # - Add the AllowEmptyInitialConfiguration option to the Screen section for the
+    #   "nvidia" driver, in order to allow the X server to start without any outputs.
+    # - Add a separate Device section for the Intel GPU, using the "modesetting"
+    #   driver and with the configured BusID.
+    # - Reference that Device section from the ServerLayout section as an inactive
+    #   device.
+    # - Configure the display manager to run specific `xrandr` commands which will
+    #   configure/enable displays connected to the Intel GPU.
+
+    services.xserver.drivers = singleton {
+      name = "nvidia";
+      modules = [ nvidia_x11.bin ];
+      libPath = [ nvidia_x11 ];
+      deviceSection = optionalString optimusCfg.enable
+        ''
+          BusID "${optimusCfg.nvidiaBusId}"
+        '';
+      screenSection =
+        ''
+          Option "RandRRotation" "on"
+          ${optionalString optimusCfg.enable "Option \"AllowEmptyInitialConfiguration\""}
+        '';
+    };
 
-    services.xserver.screenSection =
+    services.xserver.extraConfig = optionalString optimusCfg.enable
+      ''
+        Section "Device"
+          Identifier "nvidia-optimus-intel"
+          Driver "modesetting"
+          BusID  "${optimusCfg.intelBusId}"
+          Option "AccelMethod" "none"
+        EndSection
+      '';
+    services.xserver.serverLayoutSection = optionalString optimusCfg.enable
       ''
-        Option "RandRRotation" "on"
+        Inactive "nvidia-optimus-intel"
       '';
 
+    services.xserver.displayManager.setupCommands = optionalString optimusCfg.enable ''
+      # Added by nvidia configuration module for Optimus/PRIME.
+      ${pkgs.xorg.xrandr}/bin/xrandr --setprovideroutputsource modesetting NVIDIA-0
+      ${pkgs.xorg.xrandr}/bin/xrandr --auto
+    '';
+
     environment.etc."nvidia/nvidia-application-profiles-rc" = mkIf nvidia_x11.useProfiles {
       source = "${nvidia_x11.bin}/share/nvidia/nvidia-application-profiles-rc";
     };
@@ -62,6 +172,8 @@ in
     boot.kernelModules = [ "nvidia-uvm" ] ++
       lib.optionals config.services.xserver.enable [ "nvidia" "nvidia_modeset" "nvidia_drm" ];
 
+    # If requested enable modesetting via kernel parameter.
+    boot.kernelParams = optional cfg.modesetting.enable "nvidia-drm.modeset=1";
 
     # Create /dev/nvidia-uvm when the nvidia-uvm module is loaded.
     services.udev.extraRules =
diff --git a/nixos/modules/i18n/input-method/default.xml b/nixos/modules/i18n/input-method/default.xml
index ab918a9fb23e..117482fb0d57 100644
--- a/nixos/modules/i18n/input-method/default.xml
+++ b/nixos/modules/i18n/input-method/default.xml
@@ -3,32 +3,50 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="module-services-input-methods">
-
-<title>Input Methods</title>
-
-<para>Input methods are an operating system component that allows any data, such
-  as keyboard strokes or mouse movements, to be received as input. In this way
-  users can enter characters and symbols not found on their input devices. Using
-  an input method is obligatory for any language that has more graphemes than
-  there are keys on the keyboard.</para>
-
-<para>The following input methods are available in NixOS:</para>
-
-<itemizedlist>
-  <listitem><para>IBus: The intelligent input bus.</para></listitem>
-  <listitem><para>Fcitx: A customizable lightweight input
-      method.</para></listitem>
-  <listitem><para>Nabi: A Korean input method based on XIM.</para></listitem>
-  <listitem><para>Uim: The universal input method, is a library with a XIM
-      bridge.</para></listitem>
-</itemizedlist>
-
-<section xml:id="module-services-input-methods-ibus"><title>IBus</title>
-
-<para>IBus is an Intelligent Input Bus. It provides full featured and user
-  friendly input method user interface.</para>
-
-<para>The following snippet can be used to configure IBus:</para>
+ <title>Input Methods</title>
+ <para>
+  Input methods are an operating system component that allows any data, such as
+  keyboard strokes or mouse movements, to be received as input. In this way
+  users can enter characters and symbols not found on their input devices.
+  Using an input method is obligatory for any language that has more graphemes
+  than there are keys on the keyboard.
+ </para>
+ <para>
+  The following input methods are available in NixOS:
+ </para>
+ <itemizedlist>
+  <listitem>
+   <para>
+    IBus: The intelligent input bus.
+   </para>
+  </listitem>
+  <listitem>
+   <para>
+    Fcitx: A customizable lightweight input method.
+   </para>
+  </listitem>
+  <listitem>
+   <para>
+    Nabi: A Korean input method based on XIM.
+   </para>
+  </listitem>
+  <listitem>
+   <para>
+    Uim: The universal input method, is a library with a XIM bridge.
+   </para>
+  </listitem>
+ </itemizedlist>
+ <section xml:id="module-services-input-methods-ibus">
+  <title>IBus</title>
+
+  <para>
+   IBus is an Intelligent Input Bus. It provides full featured and user
+   friendly input method user interface.
+  </para>
+
+  <para>
+   The following snippet can be used to configure IBus:
+  </para>
 
 <programlisting>
 i18n.inputMethod = {
@@ -37,57 +55,89 @@ i18n.inputMethod = {
 };
 </programlisting>
 
-<para><literal>i18n.inputMethod.ibus.engines</literal> is optional and can be
-  used to add extra IBus engines.</para>
-
-<para>Available extra IBus engines are:</para>
-
-<itemizedlist>
-  <listitem><para>Anthy (<literal>ibus-engines.anthy</literal>): Anthy is a
-      system for Japanese input method. It converts Hiragana text to Kana Kanji
-      mixed text.</para></listitem>
-  <listitem><para>Hangul (<literal>ibus-engines.hangul</literal>): Korean input
-      method.</para></listitem>
-  <listitem><para>m17n (<literal>ibus-engines.m17n</literal>): m17n is an input
-      method that uses input methods and corresponding icons in the m17n
-      database.</para></listitem>
-  <listitem><para>mozc (<literal>ibus-engines.mozc</literal>): A Japanese input
-      method from Google.</para></listitem>
-  <listitem><para>Table (<literal>ibus-engines.table</literal>): An input method
-      that load tables of input methods.</para></listitem>
-  <listitem><para>table-others (<literal>ibus-engines.table-others</literal>):
-      Various table-based input methods. To use this, and any other table-based
-      input methods, it must appear in the list of engines along with
-      <literal>table</literal>. For example:
+  <para>
+   <literal>i18n.inputMethod.ibus.engines</literal> is optional and can be used
+   to add extra IBus engines.
+  </para>
+
+  <para>
+   Available extra IBus engines are:
+  </para>
+
+  <itemizedlist>
+   <listitem>
+    <para>
+     Anthy (<literal>ibus-engines.anthy</literal>): Anthy is a system for
+     Japanese input method. It converts Hiragana text to Kana Kanji mixed text.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Hangul (<literal>ibus-engines.hangul</literal>): Korean input method.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     m17n (<literal>ibus-engines.m17n</literal>): m17n is an input method that
+     uses input methods and corresponding icons in the m17n database.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     mozc (<literal>ibus-engines.mozc</literal>): A Japanese input method from
+     Google.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Table (<literal>ibus-engines.table</literal>): An input method that load
+     tables of input methods.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     table-others (<literal>ibus-engines.table-others</literal>): Various
+     table-based input methods. To use this, and any other table-based input
+     methods, it must appear in the list of engines along with
+     <literal>table</literal>. For example:
 <programlisting>
 ibus.engines = with pkgs.ibus-engines; [ table table-others ];
 </programlisting>
-  </para></listitem>
-</itemizedlist>
-
-<para>To use any input method, the package must be added in the configuration,
-  as shown above, and also (after running <literal>nixos-rebuild</literal>) the
-  input method must be added from IBus' preference dialog.</para>
-
-<simplesect xml:id="module-services-input-methods-troubleshooting">
-  <title>Troubleshooting</title>
-  <para>If IBus works in some applications but not others, a likely cause of
-  this is that IBus is depending on a different version of
-  <literal>glib</literal> to what the applications are depending on. This can
-  be checked by running <literal>nix-store -q --requisites &lt;path&gt; | grep
-  glib</literal>, where <literal>&lt;path&gt;</literal> is the path of either
-  IBus or an application in the Nix store. The <literal>glib</literal>
-  packages must match exactly. If they do not, uninstalling and reinstalling
-  the application is a likely fix.</para>
-</simplesect>
-</section>
-
-<section xml:id="module-services-input-methods-fcitx"><title>Fcitx</title>
-
-<para>Fcitx is an input method framework with extension support. It has three
-  built-in Input Method Engine, Pinyin, QuWei and Table-based input
-  methods.</para>
-<para>The following snippet can be used to configure Fcitx:</para>
+    </para>
+   </listitem>
+  </itemizedlist>
+
+  <para>
+   To use any input method, the package must be added in the configuration, as
+   shown above, and also (after running <literal>nixos-rebuild</literal>) the
+   input method must be added from IBus' preference dialog.
+  </para>
+
+  <simplesect xml:id="module-services-input-methods-troubleshooting">
+   <title>Troubleshooting</title>
+   <para>
+    If IBus works in some applications but not others, a likely cause of this
+    is that IBus is depending on a different version of <literal>glib</literal>
+    to what the applications are depending on. This can be checked by running
+    <literal>nix-store -q --requisites &lt;path&gt; | grep glib</literal>,
+    where <literal>&lt;path&gt;</literal> is the path of either IBus or an
+    application in the Nix store. The <literal>glib</literal> packages must
+    match exactly. If they do not, uninstalling and reinstalling the
+    application is a likely fix.
+   </para>
+  </simplesect>
+ </section>
+ <section xml:id="module-services-input-methods-fcitx">
+  <title>Fcitx</title>
+
+  <para>
+   Fcitx is an input method framework with extension support. It has three
+   built-in Input Method Engine, Pinyin, QuWei and Table-based input methods.
+  </para>
+
+  <para>
+   The following snippet can be used to configure Fcitx:
+  </para>
 
 <programlisting>
 i18n.inputMethod = {
@@ -96,51 +146,89 @@ i18n.inputMethod = {
 };
 </programlisting>
 
-<para><literal>i18n.inputMethod.fcitx.engines</literal> is optional and can be
-  used to add extra Fcitx engines.</para>
-
-<para>Available extra Fcitx engines are:</para>
-
-<itemizedlist>
-  <listitem><para>Anthy (<literal>fcitx-engines.anthy</literal>): Anthy is a
-      system for Japanese input method. It converts Hiragana text to Kana Kanji
-      mixed text.</para></listitem>
-  <listitem><para>Chewing (<literal>fcitx-engines.chewing</literal>): Chewing is
-      an intelligent Zhuyin input method. It is one of the most popular input
-      methods among Traditional Chinese Unix users.</para></listitem>
-  <listitem><para>Hangul (<literal>fcitx-engines.hangul</literal>): Korean input
-      method.</para></listitem>
-  <listitem><para>Unikey (<literal>fcitx-engines.unikey</literal>): Vietnamese input
-      method.</para></listitem>
-  <listitem><para>m17n (<literal>fcitx-engines.m17n</literal>): m17n is an input
-      method that uses input methods and corresponding icons in the m17n
-      database.</para></listitem>
-  <listitem><para>mozc (<literal>fcitx-engines.mozc</literal>): A Japanese input
-      method from Google.</para></listitem>
-  <listitem><para>table-others (<literal>fcitx-engines.table-others</literal>):
-      Various table-based input methods.</para></listitem>
-</itemizedlist>
-</section>
-
-<section xml:id="module-services-input-methods-nabi"><title>Nabi</title>
-
-<para>Nabi is an easy to use Korean X input method. It allows you to enter
-  phonetic Korean characters (hangul) and pictographic Korean characters
-  (hanja).</para>
-<para>The following snippet can be used to configure Nabi:</para>
+  <para>
+   <literal>i18n.inputMethod.fcitx.engines</literal> is optional and can be
+   used to add extra Fcitx engines.
+  </para>
+
+  <para>
+   Available extra Fcitx engines are:
+  </para>
+
+  <itemizedlist>
+   <listitem>
+    <para>
+     Anthy (<literal>fcitx-engines.anthy</literal>): Anthy is a system for
+     Japanese input method. It converts Hiragana text to Kana Kanji mixed text.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Chewing (<literal>fcitx-engines.chewing</literal>): Chewing is an
+     intelligent Zhuyin input method. It is one of the most popular input
+     methods among Traditional Chinese Unix users.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Hangul (<literal>fcitx-engines.hangul</literal>): Korean input method.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Unikey (<literal>fcitx-engines.unikey</literal>): Vietnamese input method.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     m17n (<literal>fcitx-engines.m17n</literal>): m17n is an input method that
+     uses input methods and corresponding icons in the m17n database.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     mozc (<literal>fcitx-engines.mozc</literal>): A Japanese input method from
+     Google.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     table-others (<literal>fcitx-engines.table-others</literal>): Various
+     table-based input methods.
+    </para>
+   </listitem>
+  </itemizedlist>
+ </section>
+ <section xml:id="module-services-input-methods-nabi">
+  <title>Nabi</title>
+
+  <para>
+   Nabi is an easy to use Korean X input method. It allows you to enter
+   phonetic Korean characters (hangul) and pictographic Korean characters
+   (hanja).
+  </para>
+
+  <para>
+   The following snippet can be used to configure Nabi:
+  </para>
 
 <programlisting>
 i18n.inputMethod = {
   <link linkend="opt-i18n.inputMethod.enabled">enabled</link> = "nabi";
 };
 </programlisting>
-</section>
+ </section>
+ <section xml:id="module-services-input-methods-uim">
+  <title>Uim</title>
 
-<section xml:id="module-services-input-methods-uim"><title>Uim</title>
+  <para>
+   Uim (short for "universal input method") is a multilingual input method
+   framework. Applications can use it through so-called bridges.
+  </para>
 
-<para>Uim (short for "universal input method") is a multilingual input method
-  framework. Applications can use it through so-called bridges.</para>
-<para>The following snippet can be used to configure uim:</para>
+  <para>
+   The following snippet can be used to configure uim:
+  </para>
 
 <programlisting>
 i18n.inputMethod = {
@@ -148,8 +236,9 @@ i18n.inputMethod = {
 };
 </programlisting>
 
-<para>Note: The <xref linkend="opt-i18n.inputMethod.uim.toolbar"/> option can be
-  used to choose uim toolbar.</para>
-
-</section>
+  <para>
+   Note: The <xref linkend="opt-i18n.inputMethod.uim.toolbar"/> option can be
+   used to choose uim toolbar.
+  </para>
+ </section>
 </chapter>
diff --git a/nixos/modules/installer/tools/nix-fallback-paths.nix b/nixos/modules/installer/tools/nix-fallback-paths.nix
index adde237c07c9..1cfc8ff8612e 100644
--- a/nixos/modules/installer/tools/nix-fallback-paths.nix
+++ b/nixos/modules/installer/tools/nix-fallback-paths.nix
@@ -1,6 +1,6 @@
 {
-  x86_64-linux = "/nix/store/mxg4bbblxfns96yrz0nalxyiyjl7gj98-nix-2.1.2";
-  i686-linux = "/nix/store/bgjgmbwirx63mwwychpikd7yc4k4lbjv-nix-2.1.2";
-  aarch64-linux = "/nix/store/yi18azn4nwrcwvaiag04jnxc1qs38fy5-nix-2.1.2";
-  x86_64-darwin = "/nix/store/fpivmcck2qpw5plrp599iraw2x9jp18k-nix-2.1.2";
+  x86_64-linux = "/nix/store/cdcia67siabmj6li7vyffgv2cry86fq8-nix-2.1.3";
+  i686-linux = "/nix/store/6q3xi6y5qnsv7d62b8n00hqfxi8rs2xs-nix-2.1.3";
+  aarch64-linux = "/nix/store/2v93d0vimlm28jg0ms6v1i6lc0fq13pn-nix-2.1.3";
+  x86_64-darwin = "/nix/store/dkjlfkrknmxbjmpfk3dg4q3nmb7m3zvk-nix-2.1.3";
 }
diff --git a/nixos/modules/installer/tools/nixos-generate-config.pl b/nixos/modules/installer/tools/nixos-generate-config.pl
index 359caad89a72..b70faa380e54 100644
--- a/nixos/modules/installer/tools/nixos-generate-config.pl
+++ b/nixos/modules/installer/tools/nixos-generate-config.pl
@@ -277,8 +277,7 @@ if ($virt eq "qemu" || $virt eq "kvm" || $virt eq "bochs") {
 
 # Also for Hyper-V.
 if ($virt eq "microsoft") {
-    push @initrdAvailableKernelModules, "hv_storvsc";
-    $videoDriver = "fbdev";
+    push @attrs, "virtualisation.hypervGuest.enable = true;"
 }
 
 
diff --git a/nixos/modules/installer/tools/nixos-option.sh b/nixos/modules/installer/tools/nixos-option.sh
index 3f1e591b97b0..327e3e6989f7 100644
--- a/nixos/modules/installer/tools/nixos-option.sh
+++ b/nixos/modules/installer/tools/nixos-option.sh
@@ -82,7 +82,7 @@ evalNix(){
   set -e
 
   if test $exit_code -eq 0; then
-      cat <<EOF
+      sed '/^warning: Nix search path/d' <<EOF
 $result
 EOF
       return 0;
@@ -90,7 +90,7 @@ EOF
       sed -n '
   /^error/ { s/, at (string):[0-9]*:[0-9]*//; p; };
   /^warning: Nix search path/ { p; };
-' <<EOF
+' >&2 <<EOF
 $result
 EOF
     exit_code=1
diff --git a/nixos/modules/misc/ids.nix b/nixos/modules/misc/ids.nix
index 3d34fb973e74..0b4ed6d3b628 100644
--- a/nixos/modules/misc/ids.nix
+++ b/nixos/modules/misc/ids.nix
@@ -289,7 +289,7 @@
       stanchion = 262;
       riak-cs = 263;
       infinoted = 264;
-      # keystone = 265; # unused, removed 2017-12-13
+      sickbeard = 265;
       # glance = 266; # unused, removed 2017-12-13
       couchpotato = 267;
       gogs = 268;
@@ -330,6 +330,7 @@
       # render = 303; # unused
       zeronet = 304;
       lirc = 305;
+      lidarr = 306;
 
       # When adding a uid, make sure it doesn't match an existing gid. And don't use uids above 399!
 
@@ -580,7 +581,7 @@
       stanchion = 262;
       riak-cs = 263;
       infinoted = 264;
-      # keystone = 265; # unused, removed 2017-12-13
+      sickbeard = 265;
       # glance = 266; # unused, removed 2017-12-13
       couchpotato = 267;
       gogs = 268;
@@ -620,6 +621,7 @@
       render = 303; # default udev rules from systemd requires these
       zeronet = 304;
       lirc = 305;
+      lidarr = 306;
 
       # When adding a gid, make sure it doesn't match an existing
       # uid. Users and groups with the same name should have equal
diff --git a/nixos/modules/misc/version.nix b/nixos/modules/misc/version.nix
index c593adcdae6e..6d78b7c593f8 100644
--- a/nixos/modules/misc/version.nix
+++ b/nixos/modules/misc/version.nix
@@ -5,7 +5,6 @@ with lib;
 let
   cfg = config.system.nixos;
 
-  revisionFile = "${toString pkgs.path}/.git-revision";
   gitRepo      = "${toString pkgs.path}/.git";
   gitCommitId  = lib.substring 0 7 (commitIdFromGitRepo gitRepo);
 in
@@ -37,9 +36,7 @@ in
     nixos.revision = mkOption {
       internal = true;
       type = types.str;
-      default = if pathIsDirectory gitRepo then commitIdFromGitRepo gitRepo
-                else if pathExists revisionFile then fileContents revisionFile
-                else "master";
+      default = lib.trivial.revisionWithDefault "master";
       description = "The Git revision from which this NixOS configuration was built.";
     };
 
diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 1a8f522a969d..261de6955ec2 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -46,6 +46,7 @@
   ./hardware/opengl.nix
   ./hardware/pcmcia.nix
   ./hardware/raid/hpsa.nix
+  ./hardware/steam-hardware.nix
   ./hardware/usb-wwan.nix
   ./hardware/onlykey.nix
   ./hardware/video/amdgpu.nix
@@ -283,6 +284,7 @@
   ./services/hardware/tlp.nix
   ./services/hardware/thinkfan.nix
   ./services/hardware/trezord.nix
+  ./services/hardware/triggerhappy.nix
   ./services/hardware/u2f.nix
   ./services/hardware/udev.nix
   ./services/hardware/udisks2.nix
@@ -365,6 +367,7 @@
   ./services/misc/jackett.nix
   ./services/misc/logkeys.nix
   ./services/misc/leaps.nix
+  ./services/misc/lidarr.nix
   ./services/misc/mantisbt.nix
   ./services/misc/mathics.nix
   ./services/misc/matrix-synapse.nix
@@ -395,6 +398,7 @@
   ./services/misc/rogue.nix
   ./services/misc/serviio.nix
   ./services/misc/safeeyes.nix
+  ./services/misc/sickbeard.nix
   ./services/misc/siproxd.nix
   ./services/misc/snapper.nix
   ./services/misc/sonarr.nix
@@ -687,6 +691,7 @@
   ./services/web-apps/codimd.nix
   ./services/web-apps/frab.nix
   ./services/web-apps/mattermost.nix
+  ./services/web-apps/nextcloud.nix
   ./services/web-apps/nexus.nix
   ./services/web-apps/pgpkeyserver-lite.nix
   ./services/web-apps/matomo.nix
@@ -730,6 +735,7 @@
   ./services/x11/display-managers/lightdm.nix
   ./services/x11/display-managers/sddm.nix
   ./services/x11/display-managers/slim.nix
+  ./services/x11/display-managers/startx.nix
   ./services/x11/display-managers/xpra.nix
   ./services/x11/fractalart.nix
   ./services/x11/hardware/libinput.nix
diff --git a/nixos/modules/programs/bash/bash.nix b/nixos/modules/programs/bash/bash.nix
index 424e1506b4c5..f664e2225550 100644
--- a/nixos/modules/programs/bash/bash.nix
+++ b/nixos/modules/programs/bash/bash.nix
@@ -33,7 +33,7 @@ let
   '';
 
   bashAliases = concatStringsSep "\n" (
-    mapAttrsFlatten (k: v: "alias ${k}='${v}'") cfg.shellAliases
+    mapAttrsFlatten (k: v: "alias ${k}=${escapeShellArg v}") cfg.shellAliases
   );
 
 in
diff --git a/nixos/modules/programs/digitalbitbox/doc.xml b/nixos/modules/programs/digitalbitbox/doc.xml
index a26653dda535..c63201628dbd 100644
--- a/nixos/modules/programs/digitalbitbox/doc.xml
+++ b/nixos/modules/programs/digitalbitbox/doc.xml
@@ -3,75 +3,64 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="module-programs-digitalbitbox">
-
-  <title>Digital Bitbox</title>
-
-  <para>
-    Digital Bitbox is a hardware wallet and second-factor authenticator.
-  </para>
-
-  <para>
-    The <literal>digitalbitbox</literal> programs module may be
-    installed by setting <literal>programs.digitalbitbox</literal>
-    to <literal>true</literal> in a manner similar to
-
+ <title>Digital Bitbox</title>
+ <para>
+  Digital Bitbox is a hardware wallet and second-factor authenticator.
+ </para>
+ <para>
+  The <literal>digitalbitbox</literal> programs module may be installed by
+  setting <literal>programs.digitalbitbox</literal> to <literal>true</literal>
+  in a manner similar to
 <programlisting>
 <xref linkend="opt-programs.digitalbitbox.enable"/> = true;
 </programlisting>
-
-    and bundles the <literal>digitalbitbox</literal> package (see <xref
+  and bundles the <literal>digitalbitbox</literal> package (see
+  <xref
       linkend="sec-digitalbitbox-package" />), which contains the
-    <literal>dbb-app</literal> and <literal>dbb-cli</literal> binaries,
-    along with the hardware module (see <xref
+  <literal>dbb-app</literal> and <literal>dbb-cli</literal> binaries, along
+  with the hardware module (see
+  <xref
       linkend="sec-digitalbitbox-hardware-module" />) which sets up the
-    necessary udev rules to access the device.
-  </para>
-
-  <para>
-    Enabling the digitalbitbox module is pretty much the easiest way to
-    get a Digital Bitbox device working on your system.
-  </para>
+  necessary udev rules to access the device.
+ </para>
+ <para>
+  Enabling the digitalbitbox module is pretty much the easiest way to get a
+  Digital Bitbox device working on your system.
+ </para>
+ <para>
+  For more information, see
+  <link xlink:href="https://digitalbitbox.com/start_linux" />.
+ </para>
+ <section xml:id="sec-digitalbitbox-package">
+  <title>Package</title>
 
   <para>
-    For more information, see
-    <link xlink:href="https://digitalbitbox.com/start_linux" />.
-  </para>
-
-  <section xml:id="sec-digitalbitbox-package">
-    <title>Package</title>
-
-    <para>
-      The binaries, <literal>dbb-app</literal> (a GUI tool) and
-      <literal>dbb-cli</literal> (a CLI tool), are available through the
-      <literal>digitalbitbox</literal> package which could be installed
-      as follows:
-
+   The binaries, <literal>dbb-app</literal> (a GUI tool) and
+   <literal>dbb-cli</literal> (a CLI tool), are available through the
+   <literal>digitalbitbox</literal> package which could be installed as
+   follows:
 <programlisting>
 <xref linkend="opt-environment.systemPackages"/> = [
   pkgs.digitalbitbox
 ];
 </programlisting>
-    </para>
-  </section>
-
-
-  <section xml:id="sec-digitalbitbox-hardware-module">
-    <title>Hardware</title>
-
-    <para>
-      The digitalbitbox hardware package enables the udev rules for
-      Digital Bitbox devices and may be installed as follows:
+  </para>
+ </section>
+ <section xml:id="sec-digitalbitbox-hardware-module">
+  <title>Hardware</title>
 
+  <para>
+   The digitalbitbox hardware package enables the udev rules for Digital Bitbox
+   devices and may be installed as follows:
 <programlisting>
 <xref linkend="opt-hardware.digitalbitbox.enable"/> = true;
 </programlisting>
-    </para>
-
-    <para>
-      In order to alter the udev rules, one may provide different values for
-      the <literal>udevRule51</literal> and <literal>udevRule52</literal>
-      attributes by means of overriding as follows:
+  </para>
 
+  <para>
+   In order to alter the udev rules, one may provide different values for the
+   <literal>udevRule51</literal> and <literal>udevRule52</literal> attributes
+   by means of overriding as follows:
 <programlisting>
 programs.digitalbitbox = {
   <link linkend="opt-programs.digitalbitbox.enable">enable</link> = true;
@@ -80,6 +69,6 @@ programs.digitalbitbox = {
   };
 };
 </programlisting>
-    </para>
-  </section>
+  </para>
+ </section>
 </chapter>
diff --git a/nixos/modules/programs/light.nix b/nixos/modules/programs/light.nix
index 6f8c389acc97..9f2a03e7e763 100644
--- a/nixos/modules/programs/light.nix
+++ b/nixos/modules/programs/light.nix
@@ -13,7 +13,8 @@ in
         default = false;
         type = types.bool;
         description = ''
-          Whether to install Light backlight control with setuid wrapper.
+          Whether to install Light backlight control command
+          and udev rules granting access to members of the "video" group.
         '';
       };
     };
@@ -21,6 +22,6 @@ in
 
   config = mkIf cfg.enable {
     environment.systemPackages = [ pkgs.light ];
-    security.wrappers.light.source = "${pkgs.light.out}/bin/light";
+    services.udev.packages = [ pkgs.light ];
   };
 }
diff --git a/nixos/modules/programs/plotinus.xml b/nixos/modules/programs/plotinus.xml
index 91740ee16ec2..902cd89e0c49 100644
--- a/nixos/modules/programs/plotinus.xml
+++ b/nixos/modules/programs/plotinus.xml
@@ -3,23 +3,28 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="module-program-plotinus">
-
-<title>Plotinus</title>
-
-<para><emphasis>Source:</emphasis> <filename>modules/programs/plotinus.nix</filename></para>
-
-<para><emphasis>Upstream documentation:</emphasis> <link xlink:href="https://github.com/p-e-w/plotinus"/></para>
-
-<para>Plotinus is a searchable command palette in every modern GTK+ application.</para>
-
-<para>When in a GTK+3 application and Plotinus is enabled, you can press <literal>Ctrl+Shift+P</literal> to open the command palette.  The command palette provides a searchable list of of all menu items in the application.</para>
-
-<para>To enable Plotinus, add the following to your <filename>configuration.nix</filename>:
-
+ <title>Plotinus</title>
+ <para>
+  <emphasis>Source:</emphasis>
+  <filename>modules/programs/plotinus.nix</filename>
+ </para>
+ <para>
+  <emphasis>Upstream documentation:</emphasis>
+  <link xlink:href="https://github.com/p-e-w/plotinus"/>
+ </para>
+ <para>
+  Plotinus is a searchable command palette in every modern GTK+ application.
+ </para>
+ <para>
+  When in a GTK+3 application and Plotinus is enabled, you can press
+  <literal>Ctrl+Shift+P</literal> to open the command palette. The command
+  palette provides a searchable list of of all menu items in the application.
+ </para>
+ <para>
+  To enable Plotinus, add the following to your
+  <filename>configuration.nix</filename>:
 <programlisting>
 <xref linkend="opt-programs.plotinus.enable"/> = true;
 </programlisting>
-
-</para>
-
+ </para>
 </chapter>
diff --git a/nixos/modules/programs/zsh/oh-my-zsh.xml b/nixos/modules/programs/zsh/oh-my-zsh.xml
index 6567d4a42fac..5cf690c1a560 100644
--- a/nixos/modules/programs/zsh/oh-my-zsh.xml
+++ b/nixos/modules/programs/zsh/oh-my-zsh.xml
@@ -3,18 +3,20 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="module-programs-zsh-ohmyzsh">
-
-<title>Oh my ZSH</title>
-
-<para><literal><link xlink:href="https://ohmyz.sh/">oh-my-zsh</link></literal> is a framework
-to manage your <link xlink:href="https://www.zsh.org/">ZSH</link> configuration
-including completion scripts for several CLI tools or custom prompt themes.</para>
-
-<section xml:id="module-programs-oh-my-zsh-usage"><title>Basic usage</title>
-<para>The module uses the <literal>oh-my-zsh</literal> package with all available features.  The
-initial setup using Nix expressions is fairly similar to the configuration format
-of <literal>oh-my-zsh</literal>.
-
+ <title>Oh my ZSH</title>
+ <para>
+  <literal><link xlink:href="https://ohmyz.sh/">oh-my-zsh</link></literal> is a
+  framework to manage your <link xlink:href="https://www.zsh.org/">ZSH</link>
+  configuration including completion scripts for several CLI tools or custom
+  prompt themes.
+ </para>
+ <section xml:id="module-programs-oh-my-zsh-usage">
+  <title>Basic usage</title>
+
+  <para>
+   The module uses the <literal>oh-my-zsh</literal> package with all available
+   features. The initial setup using Nix expressions is fairly similar to the
+   configuration format of <literal>oh-my-zsh</literal>.
 <programlisting>
 {
   programs.ohMyZsh = {
@@ -24,39 +26,50 @@ of <literal>oh-my-zsh</literal>.
   };
 }
 </programlisting>
-
-For a detailed explanation of these arguments please refer to the
-<link xlink:href="https://github.com/robbyrussell/oh-my-zsh/wiki"><literal>oh-my-zsh</literal> docs</link>.
-</para>
-<para>The expression generates the needed
-configuration and writes it into your <literal>/etc/zshrc</literal>.
-</para></section>
-
-<section xml:id="module-programs-oh-my-zsh-additions"><title>Custom additions</title>
-
-<para>Sometimes third-party or custom scripts such as a modified theme may be needed.
-<literal>oh-my-zsh</literal> provides the
-<link xlink:href="https://github.com/robbyrussell/oh-my-zsh/wiki/Customization#overriding-internals"><literal>ZSH_CUSTOM</literal></link> 
-environment variable for this which points to a directory with additional scripts.</para>
-
-<para>The module can do this as well:
-
+   For a detailed explanation of these arguments please refer to the
+   <link xlink:href="https://github.com/robbyrussell/oh-my-zsh/wiki"><literal>oh-my-zsh</literal>
+   docs</link>.
+  </para>
+
+  <para>
+   The expression generates the needed configuration and writes it into your
+   <literal>/etc/zshrc</literal>.
+  </para>
+ </section>
+ <section xml:id="module-programs-oh-my-zsh-additions">
+  <title>Custom additions</title>
+
+  <para>
+   Sometimes third-party or custom scripts such as a modified theme may be
+   needed. <literal>oh-my-zsh</literal> provides the
+   <link xlink:href="https://github.com/robbyrussell/oh-my-zsh/wiki/Customization#overriding-internals"><literal>ZSH_CUSTOM</literal></link>
+   environment variable for this which points to a directory with additional
+   scripts.
+  </para>
+
+  <para>
+   The module can do this as well:
 <programlisting>
 {
   programs.ohMyZsh.custom = "~/path/to/custom/scripts";
 }
 </programlisting>
-</para></section>
-
-<section xml:id="module-programs-oh-my-zsh-environments"><title>Custom environments</title>
-
-<para>There are several extensions for <literal>oh-my-zsh</literal> packaged in <literal>nixpkgs</literal>.
-One of them is <link xlink:href="https://github.com/spwhitt/nix-zsh-completions">nix-zsh-completions</link>
-which bundles completion scripts and a plugin for <literal>oh-my-zsh</literal>.</para>
-
-<para>Rather than using a single mutable path for <literal>ZSH_CUSTOM</literal>, it's also possible to
-generate this path from a list of Nix packages:
-
+  </para>
+ </section>
+ <section xml:id="module-programs-oh-my-zsh-environments">
+  <title>Custom environments</title>
+
+  <para>
+   There are several extensions for <literal>oh-my-zsh</literal> packaged in
+   <literal>nixpkgs</literal>. One of them is
+   <link xlink:href="https://github.com/spwhitt/nix-zsh-completions">nix-zsh-completions</link>
+   which bundles completion scripts and a plugin for
+   <literal>oh-my-zsh</literal>.
+  </para>
+
+  <para>
+   Rather than using a single mutable path for <literal>ZSH_CUSTOM</literal>,
+   it's also possible to generate this path from a list of Nix packages:
 <programlisting>
 { pkgs, ... }:
 {
@@ -66,42 +79,59 @@ generate this path from a list of Nix packages:
   ];
 }
 </programlisting>
-
-Internally a single store path will be created using <literal>buildEnv</literal>.
-Please refer to the docs of
-<link xlink:href="https://nixos.org/nixpkgs/manual/#sec-building-environment"><literal>buildEnv</literal></link>
-for further reference.</para>
-
-<para><emphasis>Please keep in mind that this is not compatible with <literal>programs.ohMyZsh.custom</literal>
-as it requires an immutable store path while <literal>custom</literal> shall remain mutable! An evaluation failure
-will be thrown if both <literal>custom</literal> and <literal>customPkgs</literal> are set.</emphasis>
-</para></section>
-
-<section xml:id="module-programs-oh-my-zsh-packaging-customizations"><title>Package your own customizations</title>
-
-<para>If third-party customizations (e.g. new themes) are supposed to be added to <literal>oh-my-zsh</literal>
-there are several pitfalls to keep in mind:</para>
-
-<itemizedlist>
-  <listitem>
-    <para>To comply with the default structure of <literal>ZSH</literal> the entire output needs to be written to
-    <literal>$out/share/zsh.</literal></para>
-  </listitem>
-  <listitem>
-    <para>Completion scripts are supposed to be stored at <literal>$out/share/zsh/site-functions</literal>. This directory
-    is part of the <literal><link xlink:href="http://zsh.sourceforge.net/Doc/Release/Functions.html">fpath</link></literal>
-    and the package should be compatible with pure <literal>ZSH</literal> setups. The module will automatically link
-    the contents of <literal>site-functions</literal> to completions directory in the proper store path.</para>
-  </listitem>
-  <listitem>
-    <para>The <literal>plugins</literal> directory needs the structure <literal>pluginname/pluginname.plugin.zsh</literal>
-    as structured in the <link xlink:href="https://github.com/robbyrussell/oh-my-zsh/tree/91b771914bc7c43dd7c7a43b586c5de2c225ceb7/plugins">upstream repo.</link>
+   Internally a single store path will be created using
+   <literal>buildEnv</literal>. Please refer to the docs of
+   <link xlink:href="https://nixos.org/nixpkgs/manual/#sec-building-environment"><literal>buildEnv</literal></link>
+   for further reference.
+  </para>
+
+  <para>
+   <emphasis>Please keep in mind that this is not compatible with
+   <literal>programs.ohMyZsh.custom</literal> as it requires an immutable store
+   path while <literal>custom</literal> shall remain mutable! An evaluation
+   failure will be thrown if both <literal>custom</literal> and
+   <literal>customPkgs</literal> are set.</emphasis>
+  </para>
+ </section>
+ <section xml:id="module-programs-oh-my-zsh-packaging-customizations">
+  <title>Package your own customizations</title>
+
+  <para>
+   If third-party customizations (e.g. new themes) are supposed to be added to
+   <literal>oh-my-zsh</literal> there are several pitfalls to keep in mind:
+  </para>
+
+  <itemizedlist>
+   <listitem>
+    <para>
+     To comply with the default structure of <literal>ZSH</literal> the entire
+     output needs to be written to <literal>$out/share/zsh.</literal>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Completion scripts are supposed to be stored at
+     <literal>$out/share/zsh/site-functions</literal>. This directory is part
+     of the
+     <literal><link xlink:href="http://zsh.sourceforge.net/Doc/Release/Functions.html">fpath</link></literal>
+     and the package should be compatible with pure <literal>ZSH</literal>
+     setups. The module will automatically link the contents of
+     <literal>site-functions</literal> to completions directory in the proper
+     store path.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     The <literal>plugins</literal> directory needs the structure
+     <literal>pluginname/pluginname.plugin.zsh</literal> as structured in the
+     <link xlink:href="https://github.com/robbyrussell/oh-my-zsh/tree/91b771914bc7c43dd7c7a43b586c5de2c225ceb7/plugins">upstream
+     repo.</link>
     </para>
-  </listitem>
-</itemizedlist>
+   </listitem>
+  </itemizedlist>
 
-<para>
-A derivation for <literal>oh-my-zsh</literal> may look like this:
+  <para>
+   A derivation for <literal>oh-my-zsh</literal> may look like this:
 <programlisting>
 { stdenv, fetchFromGitHub }:
 
@@ -120,6 +150,6 @@ stdenv.mkDerivation rec {
   '';
 }
 </programlisting>
-</para>
-</section>
+  </para>
+ </section>
 </chapter>
diff --git a/nixos/modules/programs/zsh/zsh.nix b/nixos/modules/programs/zsh/zsh.nix
index b4ca8730958c..865d148c1629 100644
--- a/nixos/modules/programs/zsh/zsh.nix
+++ b/nixos/modules/programs/zsh/zsh.nix
@@ -11,7 +11,7 @@ let
   cfg = config.programs.zsh;
 
   zshAliases = concatStringsSep "\n" (
-    mapAttrsFlatten (k: v: "alias ${k}='${v}'") cfg.shellAliases
+    mapAttrsFlatten (k: v: "alias ${k}=${escapeShellArg v}") cfg.shellAliases
   );
 
 in
diff --git a/nixos/modules/rename.nix b/nixos/modules/rename.nix
index bc9ff9f63dd7..eb74b9bcac12 100644
--- a/nixos/modules/rename.nix
+++ b/nixos/modules/rename.nix
@@ -39,6 +39,7 @@ with lib;
     (mkRenamedOptionModule [ "services" "kubernetes" "apiserver" "address" ] ["services" "kubernetes" "apiserver" "bindAddress"])
     (mkRemovedOptionModule [ "services" "kubernetes" "apiserver" "publicAddress" ] "")
     (mkRenamedOptionModule [ "services" "kubernetes" "addons" "dashboard" "enableRBAC" ] [ "services" "kubernetes" "addons" "dashboard" "rbac" "enable" ])
+    (mkRemovedOptionModule [ "services" "kubernetes" "kubelet" "cadvisorPort" ] "")
     (mkRenamedOptionModule [ "services" "logstash" "address" ] [ "services" "logstash" "listenAddress" ])
     (mkRenamedOptionModule [ "services" "mpd" "network" "host" ] [ "services" "mpd" "network" "listenAddress" ])
     (mkRenamedOptionModule [ "services" "neo4j" "host" ] [ "services" "neo4j" "defaultListenAddress" ])
diff --git a/nixos/modules/security/acme.xml b/nixos/modules/security/acme.xml
index b4cd83f6632c..ef71fe53d0c7 100644
--- a/nixos/modules/security/acme.xml
+++ b/nixos/modules/security/acme.xml
@@ -3,23 +3,25 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="module-security-acme">
-
-<title>SSL/TLS Certificates with ACME</title>
-
-<para>NixOS supports automatic domain validation &amp; certificate
-retrieval and renewal using the ACME protocol. This is currently only
-implemented by and for Let's Encrypt. The alternative ACME client
-<literal>simp_le</literal> is used under the hood.</para>
-
-<section xml:id="module-security-acme-prerequisites"><title>Prerequisites</title>
-
-<para>You need to have a running HTTP server for verification. The server must
-have a webroot defined that can serve
-<filename>.well-known/acme-challenge</filename>. This directory must be
-writeable by the user that will run the ACME client.</para>
-
-<para>For instance, this generic snippet could be used for Nginx:
-
+ <title>SSL/TLS Certificates with ACME</title>
+ <para>
+  NixOS supports automatic domain validation &amp; certificate retrieval and
+  renewal using the ACME protocol. This is currently only implemented by and
+  for Let's Encrypt. The alternative ACME client <literal>simp_le</literal> is
+  used under the hood.
+ </para>
+ <section xml:id="module-security-acme-prerequisites">
+  <title>Prerequisites</title>
+
+  <para>
+   You need to have a running HTTP server for verification. The server must
+   have a webroot defined that can serve
+   <filename>.well-known/acme-challenge</filename>. This directory must be
+   writeable by the user that will run the ACME client.
+  </para>
+
+  <para>
+   For instance, this generic snippet could be used for Nginx:
 <programlisting>
 http {
   server {
@@ -37,43 +39,47 @@ http {
   }
 }
 </programlisting>
-</para>
-
-</section>
-
-<section xml:id="module-security-acme-configuring"><title>Configuring</title>
-
-<para>To enable ACME certificate retrieval &amp; renewal for a certificate for
-<literal>foo.example.com</literal>, add the following in your
-<filename>configuration.nix</filename>:
-
+  </para>
+ </section>
+ <section xml:id="module-security-acme-configuring">
+  <title>Configuring</title>
+
+  <para>
+   To enable ACME certificate retrieval &amp; renewal for a certificate for
+   <literal>foo.example.com</literal>, add the following in your
+   <filename>configuration.nix</filename>:
 <programlisting>
 <xref linkend="opt-security.acme.certs"/>."foo.example.com" = {
   <link linkend="opt-security.acme.certs._name_.webroot">webroot</link> = "/var/www/challenges";
   <link linkend="opt-security.acme.certs._name_.email">email</link> = "foo@example.com";
 };
 </programlisting>
-</para>
-
-<para>The private key <filename>key.pem</filename> and certificate
-<filename>fullchain.pem</filename> will be put into
-<filename>/var/lib/acme/foo.example.com</filename>. The target directory can
-be configured with the option <xref linkend="opt-security.acme.directory"/>.
-</para>
-
-<para>Refer to <xref linkend="ch-options" /> for all available configuration
-options for the <link linkend="opt-security.acme.certs">security.acme</link> module.</para>
-
-</section>
-
-<section xml:id="module-security-acme-nginx"><title>Using ACME certificates in Nginx</title>
-<para>NixOS supports fetching ACME certificates for you by setting
-  <literal><link linkend="opt-services.nginx.virtualHosts._name_.enableACME">enableACME</link> = true;</literal> in a virtualHost config. We
-first create self-signed placeholder certificates in place of the
-real ACME certs. The placeholder certs are overwritten when the ACME
-certs arrive. For <literal>foo.example.com</literal> the config would
-look like.
-</para>
+  </para>
+
+  <para>
+   The private key <filename>key.pem</filename> and certificate
+   <filename>fullchain.pem</filename> will be put into
+   <filename>/var/lib/acme/foo.example.com</filename>. The target directory can
+   be configured with the option <xref linkend="opt-security.acme.directory"/>.
+  </para>
+
+  <para>
+   Refer to <xref linkend="ch-options" /> for all available configuration
+   options for the <link linkend="opt-security.acme.certs">security.acme</link>
+   module.
+  </para>
+ </section>
+ <section xml:id="module-security-acme-nginx">
+  <title>Using ACME certificates in Nginx</title>
+
+  <para>
+   NixOS supports fetching ACME certificates for you by setting
+   <literal><link linkend="opt-services.nginx.virtualHosts._name_.enableACME">enableACME</link>
+   = true;</literal> in a virtualHost config. We first create self-signed
+   placeholder certificates in place of the real ACME certs. The placeholder
+   certs are overwritten when the ACME certs arrive. For
+   <literal>foo.example.com</literal> the config would look like.
+  </para>
 
 <programlisting>
 services.nginx = {
@@ -89,5 +95,5 @@ services.nginx = {
   };
 }
 </programlisting>
-</section>
+ </section>
 </chapter>
diff --git a/nixos/modules/security/hidepid.xml b/nixos/modules/security/hidepid.xml
index d69341eb3cde..5a17cb1da412 100644
--- a/nixos/modules/security/hidepid.xml
+++ b/nixos/modules/security/hidepid.xml
@@ -3,31 +3,26 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="sec-hidepid">
-
-  <title>Hiding process information</title>
-
-  <para>
-    Setting
+ <title>Hiding process information</title>
+ <para>
+  Setting
 <programlisting>
 <xref linkend="opt-security.hideProcessInformation"/> = true;
 </programlisting>
-    ensures that access to process information is restricted to the
-    owning user.  This implies, among other things, that command-line
-    arguments remain private.  Unless your deployment relies on unprivileged
-    users being able to inspect the process information of other users, this
-    option should be safe to enable.
-  </para>
-
-  <para>
-    Members of the <literal>proc</literal> group are exempt from process
-    information hiding.
-  </para>
-
-  <para>
-    To allow a service <replaceable>foo</replaceable> to run without process information hiding, set
+  ensures that access to process information is restricted to the owning user.
+  This implies, among other things, that command-line arguments remain private.
+  Unless your deployment relies on unprivileged users being able to inspect the
+  process information of other users, this option should be safe to enable.
+ </para>
+ <para>
+  Members of the <literal>proc</literal> group are exempt from process
+  information hiding.
+ </para>
+ <para>
+  To allow a service <replaceable>foo</replaceable> to run without process
+  information hiding, set
 <programlisting>
 <link linkend="opt-systemd.services._name_.serviceConfig">systemd.services.<replaceable>foo</replaceable>.serviceConfig</link>.SupplementaryGroups = [ "proc" ];
 </programlisting>
-  </para>
-
+ </para>
 </chapter>
diff --git a/nixos/modules/security/pam.nix b/nixos/modules/security/pam.nix
index bef10b4fe614..926c6d77d3bb 100644
--- a/nixos/modules/security/pam.nix
+++ b/nixos/modules/security/pam.nix
@@ -548,6 +548,13 @@ in
     environment.etc =
       mapAttrsToList (n: v: makePAMService v) config.security.pam.services;
 
+    systemd.tmpfiles.rules = optionals
+      (any (s: s.updateWtmp) (attrValues config.security.pam.services))
+      [
+        "f /var/log/wtmp"
+        "f /var/log/lastlog"
+      ];
+
     security.pam.services =
       { other.text =
           ''
diff --git a/nixos/modules/security/polkit.nix b/nixos/modules/security/polkit.nix
index 04685f2c9ea1..7f1de81d5b70 100644
--- a/nixos/modules/security/polkit.nix
+++ b/nixos/modules/security/polkit.nix
@@ -88,11 +88,11 @@ in
       "polkit-agent-helper-1".source = "${pkgs.polkit.out}/lib/polkit-1/polkit-agent-helper-1";
     };
 
-    system.activationScripts.polkit =
-      ''
-        # Probably no more needed, clean up
-        rm -rf /var/lib/{polkit-1,PolicyKit}
-      '';
+    systemd.tmpfiles.rules = [
+      # Probably no more needed, clean up
+      "R /var/lib/polkit-1"
+      "R /var/lib/PolicyKit"
+    ];
 
     users.users.polkituser = {
       description = "PolKit daemon";
diff --git a/nixos/modules/services/cluster/kubernetes/default.nix b/nixos/modules/services/cluster/kubernetes/default.nix
index aeaa6bd66c99..e63d91eb9aca 100644
--- a/nixos/modules/services/cluster/kubernetes/default.nix
+++ b/nixos/modules/services/cluster/kubernetes/default.nix
@@ -622,13 +622,6 @@ in {
         type = types.bool;
       };
 
-      # TODO: remove this deprecated flag
-      cadvisorPort = mkOption {
-        description = "Kubernetes kubelet local cadvisor port.";
-        default = 4194;
-        type = types.int;
-      };
-
       clusterDns = mkOption {
         description = "Use alternative DNS.";
         default = "10.1.0.1";
@@ -862,7 +855,6 @@ in {
             --hostname-override=${cfg.kubelet.hostname} \
             --allow-privileged=${boolToString cfg.kubelet.allowPrivileged} \
             --root-dir=${cfg.dataDir} \
-            --cadvisor_port=${toString cfg.kubelet.cadvisorPort} \
             ${optionalString (cfg.kubelet.clusterDns != "")
               "--cluster-dns=${cfg.kubelet.clusterDns}"} \
             ${optionalString (cfg.kubelet.clusterDomain != "")
diff --git a/nixos/modules/services/databases/foundationdb.xml b/nixos/modules/services/databases/foundationdb.xml
index 7883680d46cc..bf4b644c9b86 100644
--- a/nixos/modules/services/databases/foundationdb.xml
+++ b/nixos/modules/services/databases/foundationdb.xml
@@ -3,42 +3,50 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="module-services-foundationdb">
-
-<title>FoundationDB</title>
-
-<para><emphasis>Source:</emphasis> <filename>modules/services/databases/foundationdb.nix</filename></para>
-
-<para><emphasis>Upstream documentation:</emphasis> <link xlink:href="https://apple.github.io/foundationdb/"/></para>
-
-<para><emphasis>Maintainer:</emphasis> Austin Seipp</para>
-
-<para><emphasis>Available version(s):</emphasis> 5.1.x, 5.2.x, 6.0.x</para>
-
-<para>FoundationDB (or "FDB") is an open source, distributed, transactional
-key-value store.</para>
-
-<section xml:id="module-services-foundationdb-configuring"><title>Configuring and basic setup</title>
-
-<para>To enable FoundationDB, add the following to your
-<filename>configuration.nix</filename>:
-
+ <title>FoundationDB</title>
+ <para>
+  <emphasis>Source:</emphasis>
+  <filename>modules/services/databases/foundationdb.nix</filename>
+ </para>
+ <para>
+  <emphasis>Upstream documentation:</emphasis>
+  <link xlink:href="https://apple.github.io/foundationdb/"/>
+ </para>
+ <para>
+  <emphasis>Maintainer:</emphasis> Austin Seipp
+ </para>
+ <para>
+  <emphasis>Available version(s):</emphasis> 5.1.x, 5.2.x, 6.0.x
+ </para>
+ <para>
+  FoundationDB (or "FDB") is an open source, distributed, transactional
+  key-value store.
+ </para>
+ <section xml:id="module-services-foundationdb-configuring">
+  <title>Configuring and basic setup</title>
+
+  <para>
+   To enable FoundationDB, add the following to your
+   <filename>configuration.nix</filename>:
 <programlisting>
 services.foundationdb.enable = true;
 services.foundationdb.package = pkgs.foundationdb52; # FoundationDB 5.2.x
 </programlisting>
-</para>
-
-<para>The <option>services.foundationdb.package</option> option is required,
-and must always be specified. Due to the fact FoundationDB network protocols and
-on-disk storage formats may change between (major) versions, and upgrades must
-be explicitly handled by the user, you must always manually specify this
-yourself so that the NixOS module will use the proper version. Note that minor,
-bugfix releases are always compatible.</para>
-
-<para>After running <command>nixos-rebuild</command>, you can verify whether
-FoundationDB is running by executing <command>fdbcli</command> (which is added
-to <option>environment.systemPackages</option>):
-
+  </para>
+
+  <para>
+   The <option>services.foundationdb.package</option> option is required, and
+   must always be specified. Due to the fact FoundationDB network protocols and
+   on-disk storage formats may change between (major) versions, and upgrades
+   must be explicitly handled by the user, you must always manually specify
+   this yourself so that the NixOS module will use the proper version. Note
+   that minor, bugfix releases are always compatible.
+  </para>
+
+  <para>
+   After running <command>nixos-rebuild</command>, you can verify whether
+   FoundationDB is running by executing <command>fdbcli</command> (which is
+   added to <option>environment.systemPackages</option>):
 <programlisting>
 $ sudo -u foundationdb fdbcli
 Using cluster file `/etc/foundationdb/fdb.cluster'.
@@ -66,14 +74,14 @@ Cluster:
 
 fdb>
 </programlisting>
-</para>
-
-<para>You can also write programs using the available client libraries.
-For example, the following Python program can be run in order to grab the
-cluster status, as a quick example. (This example uses
-<command>nix-shell</command> shebang support to automatically supply the
-necessary Python modules).
-
+  </para>
+
+  <para>
+   You can also write programs using the available client libraries. For
+   example, the following Python program can be run in order to grab the
+   cluster status, as a quick example. (This example uses
+   <command>nix-shell</command> shebang support to automatically supply the
+   necessary Python modules).
 <programlisting>
 a@link> cat fdb-status.py
 #! /usr/bin/env nix-shell
@@ -100,255 +108,336 @@ a@link> ./fdb-status.py
 FoundationDB available: True
 a@link>
 </programlisting>
-</para>
-
-<para>FoundationDB is run under the <command>foundationdb</command> user and
-group by default, but this may be changed in the NixOS configuration. The
-systemd unit <command>foundationdb.service</command> controls the
-<command>fdbmonitor</command> process.</para>
-
-<para>By default, the NixOS module for FoundationDB creates a single
-SSD-storage based database for development and basic usage. This storage engine
-is designed for SSDs and will perform poorly on HDDs; however it can handle far
-more data than the alternative "memory" engine and is a better default choice
-for most deployments. (Note that you can change the storage backend on-the-fly
-for a given FoundationDB cluster using <command>fdbcli</command>.)</para>
-
-<para>Furthermore, only 1 server process and 1 backup agent are started in the
-default configuration. See below for more on scaling to increase this.</para>
-
-<para>FoundationDB stores all data for all server processes under
-<filename>/var/lib/foundationdb</filename>. You can override this using
-<option>services.foundationdb.dataDir</option>, e.g.
-
+  </para>
+
+  <para>
+   FoundationDB is run under the <command>foundationdb</command> user and group
+   by default, but this may be changed in the NixOS configuration. The systemd
+   unit <command>foundationdb.service</command> controls the
+   <command>fdbmonitor</command> process.
+  </para>
+
+  <para>
+   By default, the NixOS module for FoundationDB creates a single SSD-storage
+   based database for development and basic usage. This storage engine is
+   designed for SSDs and will perform poorly on HDDs; however it can handle far
+   more data than the alternative "memory" engine and is a better default
+   choice for most deployments. (Note that you can change the storage backend
+   on-the-fly for a given FoundationDB cluster using
+   <command>fdbcli</command>.)
+  </para>
+
+  <para>
+   Furthermore, only 1 server process and 1 backup agent are started in the
+   default configuration. See below for more on scaling to increase this.
+  </para>
+
+  <para>
+   FoundationDB stores all data for all server processes under
+   <filename>/var/lib/foundationdb</filename>. You can override this using
+   <option>services.foundationdb.dataDir</option>, e.g.
 <programlisting>
 services.foundationdb.dataDir = "/data/fdb";
 </programlisting>
-
-</para>
-
-<para>Similarly, logs are stored under
-<filename>/var/log/foundationdb</filename> by default, and there is a
-corresponding <option>services.foundationdb.logDir</option> as well.</para>
-
-</section>
-
-<section xml:id="module-services-foundationdb-scaling"><title>Scaling processes and backup agents</title>
-
-<para>Scaling the number of server processes is quite easy; simply specify
-<option>services.foundationdb.serverProcesses</option> to be the number of
-FoundationDB worker processes that should be started on the machine.</para>
-
-<para>FoundationDB worker processes typically require 4GB of RAM per-process at
-minimum for good performance, so this option is set to 1 by default since the
-maximum amount of RAM is unknown. You're advised to abide by this restriction,
-so pick a number of processes so that each has 4GB or more.</para>
-
-<para>A similar option exists in order to scale backup agent processes,
-<option>services.foundationdb.backupProcesses</option>. Backup agents are not
-as performance/RAM sensitive, so feel free to experiment with the number of
-available backup processes.</para>
-
-</section>
-
-<section xml:id="module-services-foundationdb-clustering"><title>Clustering</title>
-
-<para>FoundationDB on NixOS works similarly to other Linux systems, so this
-section will be brief. Please refer to the full FoundationDB documentation for
-more on clustering.</para>
-
-<para>FoundationDB organizes clusters using a set of
-<emphasis>coordinators</emphasis>, which are just specially-designated worker
-processes. By default, every installation of FoundationDB on NixOS will start
-as its own individual cluster, with a single coordinator: the first worker
-process on <command>localhost</command>.</para>
-
-<para>Coordinators are specified globally using the
-<command>/etc/foundationdb/fdb.cluster</command> file, which all servers and
-client applications will use to find and join coordinators. Note that this file
-<emphasis>can not</emphasis> be managed by NixOS so easily: FoundationDB is
-designed so that it will rewrite the file at runtime for all clients and nodes
-when cluster coordinators change, with clients transparently handling this
-without intervention. It is fundamentally a mutable file, and you should not
-try to manage it in any way in NixOS.</para>
-
-<para>When dealing with a cluster, there are two main things you want to
-do:</para>
-
-<itemizedlist>
-  <listitem><para>Add a node to the cluster for storage/compute.</para></listitem>
-  <listitem><para>Promote an ordinary worker to a coordinator.</para></listitem>
-</itemizedlist>
-
-<para>A node must already be a member of the cluster in order to properly be
-promoted to a coordinator, so you must always add it first if you wish to
-promote it.</para>
-
-<para>To add a machine to a FoundationDB cluster:</para>
-
-<itemizedlist>
-  <listitem><para>Choose one of the servers to start as the initial coordinator.
-      </para></listitem>
-  <listitem><para>Copy the <command>/etc/foundationdb/fdb.cluster</command> file
-      from this server to all the other servers. Restart FoundationDB on all of
-      these other servers, so they join the cluster.</para></listitem>
-  <listitem><para>All of these servers are now connected and working together
-      in the cluster, under the chosen coordinator.</para></listitem>
-</itemizedlist>
-
-<para>At this point, you can add as many nodes as you want by just repeating
-the above steps. By default there will still be a single coordinator: you can
-use <command>fdbcli</command> to change this and add new coordinators.</para>
-
-<para>As a convenience, FoundationDB can automatically assign coordinators
-based on the redundancy mode you wish to achieve for the cluster. Once all the
-nodes have been joined, simply set the replication policy, and then issue the
-<command>coordinators auto</command> command</para>
-
-<para>For example, assuming we have 3 nodes available, we can enable double
-redundancy mode, then auto-select coordinators. For double redundancy, 3
-coordinators is ideal: therefore FoundationDB will make
-<emphasis>every</emphasis> node a coordinator automatically:</para>
+  </para>
+
+  <para>
+   Similarly, logs are stored under <filename>/var/log/foundationdb</filename>
+   by default, and there is a corresponding
+   <option>services.foundationdb.logDir</option> as well.
+  </para>
+ </section>
+ <section xml:id="module-services-foundationdb-scaling">
+  <title>Scaling processes and backup agents</title>
+
+  <para>
+   Scaling the number of server processes is quite easy; simply specify
+   <option>services.foundationdb.serverProcesses</option> to be the number of
+   FoundationDB worker processes that should be started on the machine.
+  </para>
+
+  <para>
+   FoundationDB worker processes typically require 4GB of RAM per-process at
+   minimum for good performance, so this option is set to 1 by default since
+   the maximum amount of RAM is unknown. You're advised to abide by this
+   restriction, so pick a number of processes so that each has 4GB or more.
+  </para>
+
+  <para>
+   A similar option exists in order to scale backup agent processes,
+   <option>services.foundationdb.backupProcesses</option>. Backup agents are
+   not as performance/RAM sensitive, so feel free to experiment with the number
+   of available backup processes.
+  </para>
+ </section>
+ <section xml:id="module-services-foundationdb-clustering">
+  <title>Clustering</title>
+
+  <para>
+   FoundationDB on NixOS works similarly to other Linux systems, so this
+   section will be brief. Please refer to the full FoundationDB documentation
+   for more on clustering.
+  </para>
+
+  <para>
+   FoundationDB organizes clusters using a set of
+   <emphasis>coordinators</emphasis>, which are just specially-designated
+   worker processes. By default, every installation of FoundationDB on NixOS
+   will start as its own individual cluster, with a single coordinator: the
+   first worker process on <command>localhost</command>.
+  </para>
+
+  <para>
+   Coordinators are specified globally using the
+   <command>/etc/foundationdb/fdb.cluster</command> file, which all servers and
+   client applications will use to find and join coordinators. Note that this
+   file <emphasis>can not</emphasis> be managed by NixOS so easily:
+   FoundationDB is designed so that it will rewrite the file at runtime for all
+   clients and nodes when cluster coordinators change, with clients
+   transparently handling this without intervention. It is fundamentally a
+   mutable file, and you should not try to manage it in any way in NixOS.
+  </para>
+
+  <para>
+   When dealing with a cluster, there are two main things you want to do:
+  </para>
+
+  <itemizedlist>
+   <listitem>
+    <para>
+     Add a node to the cluster for storage/compute.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Promote an ordinary worker to a coordinator.
+    </para>
+   </listitem>
+  </itemizedlist>
+
+  <para>
+   A node must already be a member of the cluster in order to properly be
+   promoted to a coordinator, so you must always add it first if you wish to
+   promote it.
+  </para>
+
+  <para>
+   To add a machine to a FoundationDB cluster:
+  </para>
+
+  <itemizedlist>
+   <listitem>
+    <para>
+     Choose one of the servers to start as the initial coordinator.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Copy the <command>/etc/foundationdb/fdb.cluster</command> file from this
+     server to all the other servers. Restart FoundationDB on all of these
+     other servers, so they join the cluster.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     All of these servers are now connected and working together in the
+     cluster, under the chosen coordinator.
+    </para>
+   </listitem>
+  </itemizedlist>
+
+  <para>
+   At this point, you can add as many nodes as you want by just repeating the
+   above steps. By default there will still be a single coordinator: you can
+   use <command>fdbcli</command> to change this and add new coordinators.
+  </para>
+
+  <para>
+   As a convenience, FoundationDB can automatically assign coordinators based
+   on the redundancy mode you wish to achieve for the cluster. Once all the
+   nodes have been joined, simply set the replication policy, and then issue
+   the <command>coordinators auto</command> command
+  </para>
+
+  <para>
+   For example, assuming we have 3 nodes available, we can enable double
+   redundancy mode, then auto-select coordinators. For double redundancy, 3
+   coordinators is ideal: therefore FoundationDB will make
+   <emphasis>every</emphasis> node a coordinator automatically:
+  </para>
 
 <programlisting>
 fdbcli> configure double ssd
 fdbcli> coordinators auto
 </programlisting>
 
-<para>This will transparently update all the servers within seconds, and
-appropriately rewrite the <command>fdb.cluster</command> file, as well as
-informing all client processes to do the same.</para>
-
-</section>
-
-<section xml:id="module-services-foundationdb-connectivity"><title>Client connectivity</title>
-
-<para>By default, all clients must use the current
-<command>fdb.cluster</command> file to access a given FoundationDB cluster.
-This file is located by default in
-<command>/etc/foundationdb/fdb.cluster</command> on all machines with the
-FoundationDB service enabled, so you may copy the active one from your cluster
-to a new node in order to connect, if it is not part of the cluster.</para>
-
-</section>
-
-<section xml:id="module-services-foundationdb-authorization"><title>Client authorization and TLS</title>
-
-<para>By default, any user who can connect to a FoundationDB process with the
-correct cluster configuration can access anything. FoundationDB uses a
-pluggable design to transport security, and out of the box it supports a
-LibreSSL-based plugin for TLS support. This plugin not only does in-flight
-encryption, but also performs client authorization based on the given
-endpoint's certificate chain. For example, a FoundationDB server may be
-configured to only accept client connections over TLS, where the client TLS
-certificate is from organization <emphasis>Acme Co</emphasis> in the
-<emphasis>Research and Development</emphasis> unit.</para>
-
-<para>Configuring TLS with FoundationDB is done using the
-<option>services.foundationdb.tls</option> options in order to control the peer
-verification string, as well as the certificate and its private key.</para>
-
-<para>Note that the certificate and its private key must be accessible to the
-FoundationDB user account that the server runs under. These files are also NOT
-managed by NixOS, as putting them into the store may reveal private
-information.</para>
-
-<para>After you have a key and certificate file in place, it is not enough to
-simply set the NixOS module options -- you must also configure the
-<command>fdb.cluster</command> file to specify that a given set of coordinators
-use TLS. This is as simple as adding the suffix <command>:tls</command> to your
-cluster coordinator configuration, after the port number. For example, assuming
-you have a coordinator on localhost with the default configuration, simply
-specifying:</para>
+  <para>
+   This will transparently update all the servers within seconds, and
+   appropriately rewrite the <command>fdb.cluster</command> file, as well as
+   informing all client processes to do the same.
+  </para>
+ </section>
+ <section xml:id="module-services-foundationdb-connectivity">
+  <title>Client connectivity</title>
+
+  <para>
+   By default, all clients must use the current <command>fdb.cluster</command>
+   file to access a given FoundationDB cluster. This file is located by default
+   in <command>/etc/foundationdb/fdb.cluster</command> on all machines with the
+   FoundationDB service enabled, so you may copy the active one from your
+   cluster to a new node in order to connect, if it is not part of the cluster.
+  </para>
+ </section>
+ <section xml:id="module-services-foundationdb-authorization">
+  <title>Client authorization and TLS</title>
+
+  <para>
+   By default, any user who can connect to a FoundationDB process with the
+   correct cluster configuration can access anything. FoundationDB uses a
+   pluggable design to transport security, and out of the box it supports a
+   LibreSSL-based plugin for TLS support. This plugin not only does in-flight
+   encryption, but also performs client authorization based on the given
+   endpoint's certificate chain. For example, a FoundationDB server may be
+   configured to only accept client connections over TLS, where the client TLS
+   certificate is from organization <emphasis>Acme Co</emphasis> in the
+   <emphasis>Research and Development</emphasis> unit.
+  </para>
+
+  <para>
+   Configuring TLS with FoundationDB is done using the
+   <option>services.foundationdb.tls</option> options in order to control the
+   peer verification string, as well as the certificate and its private key.
+  </para>
+
+  <para>
+   Note that the certificate and its private key must be accessible to the
+   FoundationDB user account that the server runs under. These files are also
+   NOT managed by NixOS, as putting them into the store may reveal private
+   information.
+  </para>
+
+  <para>
+   After you have a key and certificate file in place, it is not enough to
+   simply set the NixOS module options -- you must also configure the
+   <command>fdb.cluster</command> file to specify that a given set of
+   coordinators use TLS. This is as simple as adding the suffix
+   <command>:tls</command> to your cluster coordinator configuration, after the
+   port number. For example, assuming you have a coordinator on localhost with
+   the default configuration, simply specifying:
+  </para>
 
 <programlisting>
 XXXXXX:XXXXXX@127.0.0.1:4500:tls
 </programlisting>
 
-<para>will configure all clients and server processes to use TLS from now
-on.</para>
-
-</section>
-
-<section xml:id="module-services-foundationdb-disaster-recovery"><title>Backups and Disaster Recovery</title>
-
-<para>The usual rules for doing FoundationDB backups apply on NixOS as written
-in the FoundationDB manual. However, one important difference is the security
-profile for NixOS: by default, the <command>foundationdb</command> systemd unit
-uses <emphasis>Linux namespaces</emphasis> to restrict write access to the
-system, except for the log directory, data directory, and the
-<command>/etc/foundationdb/</command> directory. This is enforced by default
-and cannot be disabled.</para>
-
-<para>However, a side effect of this is that the <command>fdbbackup</command>
-command doesn't work properly for local filesystem backups: FoundationDB uses a
-server process alongside the database processes to perform backups and copy the
-backups to the filesystem. As a result, this process is put under the
-restricted namespaces above: the backup process can only write to a limited
-number of paths.</para>
-
-<para>In order to allow flexible backup locations on local disks, the
-FoundationDB NixOS module supports a
-<option>services.foundationdb.extraReadWritePaths</option> option. This option
-takes a list of paths, and adds them to the systemd unit, allowing the
-processes inside the service to write (and read) the specified
-directories.</para>
-
-<para>For example, to create backups in <command>/opt/fdb-backups</command>,
-first set up the paths in the module options:</para>
+  <para>
+   will configure all clients and server processes to use TLS from now on.
+  </para>
+ </section>
+ <section xml:id="module-services-foundationdb-disaster-recovery">
+  <title>Backups and Disaster Recovery</title>
+
+  <para>
+   The usual rules for doing FoundationDB backups apply on NixOS as written in
+   the FoundationDB manual. However, one important difference is the security
+   profile for NixOS: by default, the <command>foundationdb</command> systemd
+   unit uses <emphasis>Linux namespaces</emphasis> to restrict write access to
+   the system, except for the log directory, data directory, and the
+   <command>/etc/foundationdb/</command> directory. This is enforced by default
+   and cannot be disabled.
+  </para>
+
+  <para>
+   However, a side effect of this is that the <command>fdbbackup</command>
+   command doesn't work properly for local filesystem backups: FoundationDB
+   uses a server process alongside the database processes to perform backups
+   and copy the backups to the filesystem. As a result, this process is put
+   under the restricted namespaces above: the backup process can only write to
+   a limited number of paths.
+  </para>
+
+  <para>
+   In order to allow flexible backup locations on local disks, the FoundationDB
+   NixOS module supports a
+   <option>services.foundationdb.extraReadWritePaths</option> option. This
+   option takes a list of paths, and adds them to the systemd unit, allowing
+   the processes inside the service to write (and read) the specified
+   directories.
+  </para>
+
+  <para>
+   For example, to create backups in <command>/opt/fdb-backups</command>, first
+   set up the paths in the module options:
+  </para>
 
 <programlisting>
 services.foundationdb.extraReadWritePaths = [ "/opt/fdb-backups" ];
 </programlisting>
 
-<para>Restart the FoundationDB service, and it will now be able to write to
-this directory (even if it does not yet exist.) Note: this path
-<emphasis>must</emphasis> exist before restarting the unit. Otherwise, systemd
-will not include it in the private FoundationDB namespace (and it will not add
-it dynamically at runtime).</para>
+  <para>
+   Restart the FoundationDB service, and it will now be able to write to this
+   directory (even if it does not yet exist.) Note: this path
+   <emphasis>must</emphasis> exist before restarting the unit. Otherwise,
+   systemd will not include it in the private FoundationDB namespace (and it
+   will not add it dynamically at runtime).
+  </para>
 
-<para>You can now perform a backup:</para>
+  <para>
+   You can now perform a backup:
+  </para>
 
 <programlisting>
 $ sudo -u foundationdb fdbbackup start  -t default -d file:///opt/fdb-backups
 $ sudo -u foundationdb fdbbackup status -t default
 </programlisting>
-
-</section>
-
-<section xml:id="module-services-foundationdb-limitations"><title>Known limitations</title>
-
-<para>The FoundationDB setup for NixOS should currently be considered beta.
-FoundationDB is not new software, but the NixOS compilation and integration has
-only undergone fairly basic testing of all the available functionality.</para>
-
-<itemizedlist>
-  <listitem><para>There is no way to specify individual parameters for
-      individual <command>fdbserver</command> processes. Currently, all server
-      processes inherit all the global <command>fdbmonitor</command> settings.
-      </para></listitem>
-  <listitem><para>Ruby bindings are not currently installed.</para></listitem>
-  <listitem><para>Go bindings are not currently installed.</para></listitem>
-</itemizedlist>
-
-</section>
-
-<section xml:id="module-services-foundationdb-options"><title>Options</title>
-
-<para>NixOS's FoundationDB module allows you to configure all of the most
-relevant configuration options for <command>fdbmonitor</command>, matching it
-quite closely. A complete list of options for the FoundationDB module may be
-found <link linkend="opt-services.foundationdb.enable">here</link>. You should
-also read the FoundationDB documentation as well.</para>
-
-</section>
-
-<section xml:id="module-services-foundationdb-full-docs"><title>Full documentation</title>
-
-<para>FoundationDB is a complex piece of software, and requires careful
-administration to properly use. Full documentation for administration can be
-found here: <link xlink:href="https://apple.github.io/foundationdb/"/>.</para>
-
-</section>
-
+ </section>
+ <section xml:id="module-services-foundationdb-limitations">
+  <title>Known limitations</title>
+
+  <para>
+   The FoundationDB setup for NixOS should currently be considered beta.
+   FoundationDB is not new software, but the NixOS compilation and integration
+   has only undergone fairly basic testing of all the available functionality.
+  </para>
+
+  <itemizedlist>
+   <listitem>
+    <para>
+     There is no way to specify individual parameters for individual
+     <command>fdbserver</command> processes. Currently, all server processes
+     inherit all the global <command>fdbmonitor</command> settings.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Ruby bindings are not currently installed.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Go bindings are not currently installed.
+    </para>
+   </listitem>
+  </itemizedlist>
+ </section>
+ <section xml:id="module-services-foundationdb-options">
+  <title>Options</title>
+
+  <para>
+   NixOS's FoundationDB module allows you to configure all of the most relevant
+   configuration options for <command>fdbmonitor</command>, matching it quite
+   closely. A complete list of options for the FoundationDB module may be found
+   <link linkend="opt-services.foundationdb.enable">here</link>. You should
+   also read the FoundationDB documentation as well.
+  </para>
+ </section>
+ <section xml:id="module-services-foundationdb-full-docs">
+  <title>Full documentation</title>
+
+  <para>
+   FoundationDB is a complex piece of software, and requires careful
+   administration to properly use. Full documentation for administration can be
+   found here: <link xlink:href="https://apple.github.io/foundationdb/"/>.
+  </para>
+ </section>
 </chapter>
diff --git a/nixos/modules/services/databases/postgresql.xml b/nixos/modules/services/databases/postgresql.xml
index 1aaf33963245..f89f0d653164 100644
--- a/nixos/modules/services/databases/postgresql.xml
+++ b/nixos/modules/services/databases/postgresql.xml
@@ -3,36 +3,39 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="module-postgresql">
-
-<title>PostgreSQL</title>
-
+ <title>PostgreSQL</title>
 <!-- FIXME: render nicely -->
-
 <!-- FIXME: source can be added automatically -->
-<para><emphasis>Source:</emphasis> <filename>modules/services/databases/postgresql.nix</filename></para>
-
-<para><emphasis>Upstream documentation:</emphasis> <link xlink:href="http://www.postgresql.org/docs/"/></para>
-
+ <para>
+  <emphasis>Source:</emphasis>
+  <filename>modules/services/databases/postgresql.nix</filename>
+ </para>
+ <para>
+  <emphasis>Upstream documentation:</emphasis>
+  <link xlink:href="http://www.postgresql.org/docs/"/>
+ </para>
 <!-- FIXME: more stuff, like maintainer? -->
-
-<para>PostgreSQL is an advanced, free relational database.<!-- MORE --></para>
-
-<section xml:id="module-services-postgres-configuring"><title>Configuring</title>
-
-<para>To enable PostgreSQL, add the following to your
-<filename>configuration.nix</filename>:
-
+ <para>
+  PostgreSQL is an advanced, free relational database.
+<!-- MORE -->
+ </para>
+ <section xml:id="module-services-postgres-configuring">
+  <title>Configuring</title>
+
+  <para>
+   To enable PostgreSQL, add the following to your
+   <filename>configuration.nix</filename>:
 <programlisting>
 <xref linkend="opt-services.postgresql.enable"/> = true;
 <xref linkend="opt-services.postgresql.package"/> = pkgs.postgresql94;
 </programlisting>
-
-Note that you are required to specify the desired version of
-PostgreSQL (e.g. <literal>pkgs.postgresql94</literal>). Since
-upgrading your PostgreSQL version requires a database dump and reload
-(see below), NixOS cannot provide a default value for
-<xref linkend="opt-services.postgresql.package"/> such as the most recent
-release of PostgreSQL.</para>
+   Note that you are required to specify the desired version of PostgreSQL
+   (e.g. <literal>pkgs.postgresql94</literal>). Since upgrading your PostgreSQL
+   version requires a database dump and reload (see below), NixOS cannot
+   provide a default value for
+   <xref linkend="opt-services.postgresql.package"/> such as the most recent
+   release of PostgreSQL.
+  </para>
 
 <!--
 <para>After running <command>nixos-rebuild</command>, you can verify
@@ -47,31 +50,28 @@ alice=>
 </screen>
 -->
 
-<para>By default, PostgreSQL stores its databases in
-<filename>/var/db/postgresql</filename>. You can override this using
-<xref linkend="opt-services.postgresql.dataDir"/>, e.g.
-
+  <para>
+   By default, PostgreSQL stores its databases in
+   <filename>/var/db/postgresql</filename>. You can override this using
+   <xref linkend="opt-services.postgresql.dataDir"/>, e.g.
 <programlisting>
 <xref linkend="opt-services.postgresql.dataDir"/> = "/data/postgresql";
 </programlisting>
-
-</para>
-
-</section>
-
-
-<section xml:id="module-services-postgres-upgrading"><title>Upgrading</title>
-
-<para>FIXME: document dump/upgrade/load cycle.</para>
-
-</section>
-
-
-<section xml:id="module-services-postgres-options"><title>Options</title>
-
-  <para>A complete list of options for the PostgreSQL module may be found <link linkend="opt-services.postgresql.enable">here</link>.</para>
-
-</section>
-
-
+  </para>
+ </section>
+ <section xml:id="module-services-postgres-upgrading">
+  <title>Upgrading</title>
+
+  <para>
+   FIXME: document dump/upgrade/load cycle.
+  </para>
+ </section>
+ <section xml:id="module-services-postgres-options">
+  <title>Options</title>
+
+  <para>
+   A complete list of options for the PostgreSQL module may be found
+   <link linkend="opt-services.postgresql.enable">here</link>.
+  </para>
+ </section>
 </chapter>
diff --git a/nixos/modules/services/desktops/flatpak.xml b/nixos/modules/services/desktops/flatpak.xml
index d9c8b711c450..8045d5fa14f8 100644
--- a/nixos/modules/services/desktops/flatpak.xml
+++ b/nixos/modules/services/desktops/flatpak.xml
@@ -3,51 +3,54 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="module-services-flatpak">
-
-<title>Flatpak</title>
-
-<para><emphasis>Source:</emphasis> <filename>modules/services/desktop/flatpak.nix</filename></para>
-
-<para><emphasis>Upstream documentation:</emphasis> <link xlink:href="https://github.com/flatpak/flatpak/wiki"/></para>
-
-<para>Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux.</para>
-
-<para>
-  To enable Flatpak, add the following to your <filename>configuration.nix</filename>:
-
-  <programlisting>
+ <title>Flatpak</title>
+ <para>
+  <emphasis>Source:</emphasis>
+  <filename>modules/services/desktop/flatpak.nix</filename>
+ </para>
+ <para>
+  <emphasis>Upstream documentation:</emphasis>
+  <link xlink:href="https://github.com/flatpak/flatpak/wiki"/>
+ </para>
+ <para>
+  Flatpak is a system for building, distributing, and running sandboxed desktop
+  applications on Linux.
+ </para>
+ <para>
+  To enable Flatpak, add the following to your
+  <filename>configuration.nix</filename>:
+<programlisting>
   <xref linkend="opt-services.flatpak.enable"/> = true;
   </programlisting>
-</para>
-
-<para>
-  For the sandboxed apps to work correctly, desktop integration portals need to be installed. If you run GNOME, this will be handled automatically for you; in other cases, you will need to add something like the following to your <filename>configuration.nix</filename>:
-
-  <programlisting>
+ </para>
+ <para>
+  For the sandboxed apps to work correctly, desktop integration portals need to
+  be installed. If you run GNOME, this will be handled automatically for you;
+  in other cases, you will need to add something like the following to your
+  <filename>configuration.nix</filename>:
+<programlisting>
   <xref linkend="opt-services.flatpak.extraPortals"/> = [ pkgs.xdg-desktop-portal-gtk ];
   </programlisting>
-</para>
-
-<para>
-  Then, you will need to add a repository, for example, <link xlink:href="https://github.com/flatpak/flatpak/wiki">Flathub</link>, either using the following commands:
-
-  <programlisting>
+ </para>
+ <para>
+  Then, you will need to add a repository, for example,
+  <link xlink:href="https://github.com/flatpak/flatpak/wiki">Flathub</link>,
+  either using the following commands:
+<programlisting>
   flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
   flatpak update
   </programlisting>
-
-  or by opening the <link xlink:href="https://flathub.org/repo/flathub.flatpakrepo">repository file</link> in GNOME Software.
-</para>
-
-<para>
+  or by opening the
+  <link xlink:href="https://flathub.org/repo/flathub.flatpakrepo">repository
+  file</link> in GNOME Software.
+ </para>
+ <para>
   Finally, you can search and install programs:
-
-  <programlisting>
+<programlisting>
   flatpak search bustle
   flatpak install flathub org.freedesktop.Bustle
   flatpak run org.freedesktop.Bustle
   </programlisting>
-
   Again, GNOME Software offers graphical interface for these tasks.
-</para>
+ </para>
 </chapter>
diff --git a/nixos/modules/services/desktops/profile-sync-daemon.nix b/nixos/modules/services/desktops/profile-sync-daemon.nix
index e3f74df3e573..4165bb64fe46 100644
--- a/nixos/modules/services/desktops/profile-sync-daemon.nix
+++ b/nixos/modules/services/desktops/profile-sync-daemon.nix
@@ -4,22 +4,7 @@ with lib;
 
 let
   cfg = config.services.psd;
-
-  configFile = ''
-    ${optionalString (cfg.users != [ ]) ''
-      USERS="${concatStringsSep " " cfg.users}"
-    ''}
-
-    ${optionalString (cfg.browsers != [ ]) ''
-      BROWSERS="${concatStringsSep " " cfg.browsers}"
-    ''}
-
-    ${optionalString (cfg.volatile != "") "VOLATILE=${cfg.volatile}"}
-    ${optionalString (cfg.daemonFile != "") "DAEMON_FILE=${cfg.daemonFile}"}
-  '';
-
 in {
-
   options.services.psd = with types; {
     enable = mkOption {
       type = bool;
@@ -28,32 +13,6 @@ in {
         Whether to enable the Profile Sync daemon.
       '';
     };
-
-    users = mkOption {
-      type = listOf str;
-      default = [ ];
-      example = [ "demo" ];
-      description = ''
-        A list of users whose browser profiles should be sync'd to tmpfs.
-      '';
-    };
-
-    browsers = mkOption {
-      type = listOf str;
-      default = [ ];
-      example = [ "chromium" "firefox" ];
-      description = ''
-        A list of browsers to sync. Available choices are:
-
-        chromium chromium-dev conkeror.mozdev.org epiphany firefox
-        firefox-trunk google-chrome google-chrome-beta google-chrome-unstable
-        heftig-aurora icecat luakit midori opera opera-developer opera-beta
-        qupzilla palemoon rekonq seamonkey
-
-        An empty list will enable all browsers.
-      '';
-    };
-
     resyncTimer = mkOption {
       type = str;
       default = "1h";
@@ -66,80 +25,53 @@ in {
         omitted.
       '';
     };
-
-    volatile = mkOption {
-      type = str;
-      default = "/run/psd-profiles";
-      description = ''
-        The directory where browser profiles should reside(this should be
-        mounted as a tmpfs). Do not include a trailing backslash.
-      '';
-    };
-
-    daemonFile = mkOption {
-      type = str;
-      default = "/run/psd";
-      description = ''
-        Where the pid and backup configuration files will be stored.
-      '';
-    };
   };
 
   config = mkIf cfg.enable {
-    assertions = [
-      { assertion = cfg.users != [];
-        message = "services.psd.users must contain at least one user";
-      }
-    ];
-
     systemd = {
-      services = {
-        psd = {
-          description = "Profile Sync daemon";
-          wants = [ "psd-resync.service" "local-fs.target" ];
-          wantedBy = [ "multi-user.target" ];
-          preStart = "mkdir -p ${cfg.volatile}";
-
-          path = with pkgs; [ glibc rsync gawk ];
-
-          unitConfig = {
-            RequiresMountsFor = [ "/home/" ];
+      user = {
+        services = {
+          psd = {
+            enable = true;
+            description = "Profile Sync daemon";
+            wants = [ "psd-resync.service" "local-fs.target" ];
+            wantedBy = [ "default.target" ];
+            path = with pkgs; [ rsync kmod gawk nettools profile-sync-daemon ];
+            unitConfig = {
+              RequiresMountsFor = [ "/home/" ];
+            };
+            serviceConfig = {
+              Type = "oneshot";
+              RemainAfterExit = "yes";
+              ExecStart = "${pkgs.profile-sync-daemon}/bin/profile-sync-daemon sync";
+              ExecStop = "${pkgs.profile-sync-daemon}/bin/profile-sync-daemon unsync";
+            };
           };
 
-          serviceConfig = {
-            Type = "oneshot";
-            RemainAfterExit = "yes";
-            ExecStart = "${pkgs.profile-sync-daemon}/bin/profile-sync-daemon sync";
-            ExecStop = "${pkgs.profile-sync-daemon}/bin/profile-sync-daemon unsync";
+          psd-resync = {
+            enable = true;
+            description = "Timed profile resync";
+            after = [ "psd.service" ];
+            wants = [ "psd-resync.timer" ];
+            partOf = [ "psd.service" ];
+            wantedBy = [ "default.target" ];
+            path = with pkgs; [ rsync kmod gawk nettools profile-sync-daemon ];
+            serviceConfig = {
+              Type = "oneshot";
+              ExecStart = "${pkgs.profile-sync-daemon}/bin/profile-sync-daemon resync";
+            };
           };
         };
 
-        psd-resync = {
-          description = "Timed profile resync";
-          after = [ "psd.service" ];
-          wants = [ "psd-resync.timer" ];
-          partOf = [ "psd.service" ];
-
-          path = with pkgs; [ glibc rsync gawk ];
+        timers.psd-resync = {
+          description = "Timer for profile sync daemon - ${cfg.resyncTimer}";
+          partOf = [ "psd-resync.service" "psd.service" ];
 
-          serviceConfig = {
-            Type = "oneshot";
-            ExecStart = "${pkgs.profile-sync-daemon}/bin/profile-sync-daemon resync";
+          timerConfig = {
+            OnUnitActiveSec = "${cfg.resyncTimer}";
           };
         };
       };
-
-      timers.psd-resync = {
-        description = "Timer for profile sync daemon - ${cfg.resyncTimer}";
-        partOf = [ "psd-resync.service" "psd.service" ];
-
-        timerConfig = {
-          OnUnitActiveSec = "${cfg.resyncTimer}";
-        };
-      };
     };
-
-    environment.etc."psd.conf".text = configFile;
-
   };
 }
diff --git a/nixos/modules/services/editors/emacs.xml b/nixos/modules/services/editors/emacs.xml
index 94eb2e6a77bf..6cf20cf4aa7e 100644
--- a/nixos/modules/services/editors/emacs.xml
+++ b/nixos/modules/services/editors/emacs.xml
@@ -3,150 +3,148 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="module-services-emacs">
-
-  <title>Emacs</title>
-
-  <!--
+ <title>Emacs</title>
+<!--
     Documentation contributors:
       Damien Cassou @DamienCassou
       Thomas Tuegel @ttuegel
       Rodney Lorrimar @rvl
   -->
+ <para>
+  <link xlink:href="http://www.gnu.org/software/emacs/">Emacs</link> is an
+  extensible, customizable, self-documenting real-time display editor — and
+  more. At its core is an interpreter for Emacs Lisp, a dialect of the Lisp
+  programming language with extensions to support text editing.
+ </para>
+ <para>
+  Emacs runs within a graphical desktop environment using the X Window System,
+  but works equally well on a text terminal. Under
+  <productname>macOS</productname>, a "Mac port" edition is available, which
+  uses Apple's native GUI frameworks.
+ </para>
+ <para>
+  <productname>Nixpkgs</productname> provides a superior environment for
+  running <application>Emacs</application>. It's simple to create custom builds
+  by overriding the default packages. Chaotic collections of Emacs Lisp code
+  and extensions can be brought under control using declarative package
+  management. <productname>NixOS</productname> even provides a
+  <command>systemd</command> user service for automatically starting the Emacs
+  daemon.
+ </para>
+ <section xml:id="module-services-emacs-installing">
+  <title>Installing <application>Emacs</application></title>
 
   <para>
-    <link xlink:href="http://www.gnu.org/software/emacs/">Emacs</link>
-    is an extensible, customizable, self-documenting real-time display
-    editor — and more. At its core is an interpreter for Emacs Lisp, a
-    dialect of the Lisp programming language with extensions to
-    support text editing.
+   Emacs can be installed in the normal way for Nix (see
+   <xref linkend="sec-package-management" />). In addition, a NixOS
+   <emphasis>service</emphasis> can be enabled.
   </para>
 
-  <para>
-    Emacs runs within a graphical desktop environment using the X
-    Window System, but works equally well on a text terminal. Under
-    <productname>macOS</productname>, a "Mac port" edition is
-    available, which uses Apple's native GUI frameworks.
-  </para>
+  <section xml:id="module-services-emacs-releases">
+   <title>The Different Releases of Emacs</title>
+
+   <para>
+    <productname>Nixpkgs</productname> defines several basic Emacs packages.
+    The following are attributes belonging to the <varname>pkgs</varname> set:
+    <variablelist>
+     <varlistentry>
+      <term>
+       <varname>emacs</varname>
+      </term>
+      <term>
+       <varname>emacs25</varname>
+      </term>
+      <listitem>
+       <para>
+        The latest stable version of Emacs 25 using the
+        <link
+                xlink:href="http://www.gtk.org">GTK+ 2</link>
+        widget toolkit.
+       </para>
+      </listitem>
+     </varlistentry>
+     <varlistentry>
+      <term>
+       <varname>emacs25-nox</varname>
+      </term>
+      <listitem>
+       <para>
+        Emacs 25 built without any dependency on X11 libraries.
+       </para>
+      </listitem>
+     </varlistentry>
+     <varlistentry>
+      <term>
+       <varname>emacsMacport</varname>
+      </term>
+      <term>
+       <varname>emacs25Macport</varname>
+      </term>
+      <listitem>
+       <para>
+        Emacs 25 with the "Mac port" patches, providing a more native look and
+        feel under macOS.
+       </para>
+      </listitem>
+     </varlistentry>
+    </variablelist>
+   </para>
+
+   <para>
+    If those aren't suitable, then the following imitation Emacs editors are
+    also available in Nixpkgs:
+    <link xlink:href="https://www.gnu.org/software/zile/">Zile</link>,
+    <link xlink:href="http://homepage.boetes.org/software/mg/">mg</link>,
+    <link xlink:href="http://yi-editor.github.io/">Yi</link>.
+   </para>
+  </section>
 
-  <para>
-    <productname>Nixpkgs</productname> provides a superior environment
-    for running <application>Emacs</application>. It's simple to
-    create custom builds by overriding the default packages. Chaotic
-    collections of Emacs Lisp code and extensions can be brought under
-    control using declarative package
-    management. <productname>NixOS</productname> even provides a
-    <command>systemd</command> user service for automatically
-    starting the Emacs daemon.
-  </para>
+  <section xml:id="module-services-emacs-adding-packages">
+   <title>Adding Packages to Emacs</title>
 
-  <section xml:id="module-services-emacs-installing">
-    <title>Installing <application>Emacs</application></title>
+   <para>
+    Emacs includes an entire ecosystem of functionality beyond text editing,
+    including a project planner, mail and news reader, debugger interface,
+    calendar, and more.
+   </para>
 
+   <para>
+    Most extensions are gotten with the Emacs packaging system
+    (<filename>package.el</filename>) from
+    <link
+        xlink:href="https://elpa.gnu.org/">Emacs Lisp Package Archive
+    (<acronym>ELPA</acronym>)</link>,
+    <link xlink:href="https://melpa.org/"><acronym>MELPA</acronym></link>,
+    <link xlink:href="https://stable.melpa.org/">MELPA Stable</link>, and
+    <link xlink:href="http://orgmode.org/elpa.html">Org ELPA</link>. Nixpkgs is
+    regularly updated to mirror all these archives.
+   </para>
+
+   <para>
+    Under NixOS, you can continue to use
+    <function>package-list-packages</function> and
+    <function>package-install</function> to install packages. You can also
+    declare the set of Emacs packages you need using the derivations from
+    Nixpkgs. The rest of this section discusses declarative installation of
+    Emacs packages through nixpkgs.
+   </para>
+
+   <note>
     <para>
-      Emacs can be installed in the normal way for Nix (see
-      <xref linkend="sec-package-management" />).
-      In addition, a NixOS <emphasis>service</emphasis>
-      can be enabled.
+     This documentation describes the new Emacs packages framework in NixOS
+     16.03 (<varname>emacsPackagesNg</varname>) which should not be confused
+     with the previous and deprecated framework
+     (<varname>emacs24Packages</varname>).
     </para>
-
-    <section xml:id="module-services-emacs-releases">
-      <title>The Different Releases of Emacs</title>
-
-      <para>
-        <productname>Nixpkgs</productname> defines several basic Emacs
-        packages. The following are attributes belonging to the
-        <varname>pkgs</varname> set:
-
-        <variablelist>
-          <varlistentry>
-            <term><varname>emacs</varname></term>
-            <term><varname>emacs25</varname></term>
-            <listitem>
-              <para>
-                The latest stable version of Emacs 25 using the <link
-                xlink:href="http://www.gtk.org">GTK+ 2</link> widget
-                toolkit.
-              </para>
-            </listitem>
-          </varlistentry>
-          <varlistentry>
-            <term><varname>emacs25-nox</varname></term>
-            <listitem>
-              <para>
-                Emacs 25 built without any dependency on X11
-                libraries.
-              </para>
-            </listitem>
-          </varlistentry>
-          <varlistentry>
-            <term><varname>emacsMacport</varname></term>
-            <term><varname>emacs25Macport</varname></term>
-            <listitem>
-              <para>
-                Emacs 25 with the "Mac port" patches, providing a more
-                native look and feel under macOS.
-              </para>
-            </listitem>
-          </varlistentry>
-        </variablelist>
-      </para>
-
-      <para>
-        If those aren't suitable, then the following imitation Emacs
-        editors are also available in Nixpkgs:
-        <link xlink:href="https://www.gnu.org/software/zile/">Zile</link>,
-        <link xlink:href="http://homepage.boetes.org/software/mg/">mg</link>,
-        <link xlink:href="http://yi-editor.github.io/">Yi</link>.
-      </para>
-
-    </section>
-    <section xml:id="module-services-emacs-adding-packages">
-      <title>Adding Packages to Emacs</title>
-      <para>
-        Emacs includes an entire ecosystem of functionality beyond
-        text editing, including a project planner, mail and news
-        reader, debugger interface, calendar, and more.
-      </para>
-
-      <para>
-        Most extensions are gotten with the Emacs packaging system
-        (<filename>package.el</filename>) from <link
-        xlink:href="https://elpa.gnu.org/">Emacs Lisp Package Archive
-        (<acronym>ELPA</acronym>)</link>,
-        <link xlink:href="https://melpa.org/"><acronym>MELPA</acronym></link>,
-        <link xlink:href="https://stable.melpa.org/">MELPA Stable</link>,
-        and <link xlink:href="http://orgmode.org/elpa.html">Org ELPA</link>.
-        Nixpkgs is regularly updated to mirror all these archives.
-      </para>
-
-      <para>
-        Under NixOS, you can continue to use
-        <function>package-list-packages</function> and
-        <function>package-install</function> to install packages. You
-        can also declare the set of Emacs packages you need using the
-        derivations from Nixpkgs. The rest of this section discusses
-        declarative installation of Emacs packages through nixpkgs.
-      </para>
-
-      <note>
-        <para>
-          This documentation describes the new Emacs packages
-          framework in NixOS 16.03
-          (<varname>emacsPackagesNg</varname>) which should not be
-          confused with the previous and deprecated framework
-          (<varname>emacs24Packages</varname>).
-        </para>
-      </note>
-
-      <para>
-        The first step to declare the list of packages you want in
-        your Emacs installation is to create a dedicated
-        derivation. This can be done in a dedicated
-        <filename>emacs.nix</filename> file such as:
-
-      <example xml:id="ex-emacsNix">
-        <title>Nix expression to build Emacs with packages (<filename>emacs.nix</filename>)</title>
-        <programlisting language="nix">
+   </note>
+
+   <para>
+    The first step to declare the list of packages you want in your Emacs
+    installation is to create a dedicated derivation. This can be done in a
+    dedicated <filename>emacs.nix</filename> file such as:
+    <example xml:id="ex-emacsNix">
+     <title>Nix expression to build Emacs with packages (<filename>emacs.nix</filename>)</title>
+<programlisting language="nix">
 /*
 This is a nix expression to build Emacs and some Emacs packages I like
 from source on any distribution where Nix is installed. This will install
@@ -181,119 +179,104 @@ in
     pkgs.notmuch   # From main packages set <co xml:id="ex-emacsNix-7" />
   ])
 </programlisting>
-      </example>
-
-      <calloutlist>
-        <callout arearefs="ex-emacsNix-1">
-          <para>
-            The first non-comment line in this file
-            (<literal>{ pkgs ? ... }</literal>)
-            indicates that the whole file represents a function.
-          </para>
-        </callout>
-
-        <callout arearefs="ex-emacsNix-2">
-          <para>
-            The <varname>let</varname> expression below defines a
-            <varname>myEmacs</varname> binding pointing to the current
-            stable version of Emacs. This binding is here to separate the
-            choice of the Emacs binary from the specification of the
-            required packages.
-          </para>
-        </callout>
-
-        <callout arearefs="ex-emacsNix-3">
-          <para>
-            This generates an <varname>emacsWithPackages</varname>
-            function. It takes a single argument: a function from a
-            package set to a list of packages (the packages that will
-            be available in Emacs).
-          </para>
-        </callout>
-
-        <callout arearefs="ex-emacsNix-4">
-          <para>
-            The rest of the file specifies the list of packages to
-            install. In the example, two packages
-            (<varname>magit</varname> and
-            <varname>zerodark-theme</varname>) are taken from MELPA
-            stable.
-          </para>
-        </callout>
-
-        <callout arearefs="ex-emacsNix-5">
-          <para>
-            Two packages (<varname>undo-tree</varname> and
-            <varname>zoom-frm</varname>) are taken from MELPA.
-          </para>
-        </callout>
-
-        <callout arearefs="ex-emacsNix-6">
-          <para>Three packages are taken from GNU ELPA.</para>
-        </callout>
-
-        <callout arearefs="ex-emacsNix-7">
-          <para>
-            <varname>notmuch</varname> is taken from a nixpkgs derivation
-            which contains an Emacs mode.
-          </para>
-        </callout>
-
-      </calloutlist>
+    </example>
+    <calloutlist>
+     <callout arearefs="ex-emacsNix-1">
+      <para>
+       The first non-comment line in this file (<literal>{ pkgs ? ...
+       }</literal>) indicates that the whole file represents a function.
       </para>
-
+     </callout>
+     <callout arearefs="ex-emacsNix-2">
       <para>
-        The result of this configuration will be an
-        <command>emacs</command> command which launches Emacs with all
-        of your chosen packages in the <varname>load-path</varname>.
+       The <varname>let</varname> expression below defines a
+       <varname>myEmacs</varname> binding pointing to the current stable
+       version of Emacs. This binding is here to separate the choice of the
+       Emacs binary from the specification of the required packages.
       </para>
-
+     </callout>
+     <callout arearefs="ex-emacsNix-3">
       <para>
-        You can check that it works by executing this in a terminal:
-
+       This generates an <varname>emacsWithPackages</varname> function. It
+       takes a single argument: a function from a package set to a list of
+       packages (the packages that will be available in Emacs).
+      </para>
+     </callout>
+     <callout arearefs="ex-emacsNix-4">
+      <para>
+       The rest of the file specifies the list of packages to install. In the
+       example, two packages (<varname>magit</varname> and
+       <varname>zerodark-theme</varname>) are taken from MELPA stable.
+      </para>
+     </callout>
+     <callout arearefs="ex-emacsNix-5">
+      <para>
+       Two packages (<varname>undo-tree</varname> and
+       <varname>zoom-frm</varname>) are taken from MELPA.
+      </para>
+     </callout>
+     <callout arearefs="ex-emacsNix-6">
+      <para>
+       Three packages are taken from GNU ELPA.
+      </para>
+     </callout>
+     <callout arearefs="ex-emacsNix-7">
+      <para>
+       <varname>notmuch</varname> is taken from a nixpkgs derivation which
+       contains an Emacs mode.
+      </para>
+     </callout>
+    </calloutlist>
+   </para>
+
+   <para>
+    The result of this configuration will be an <command>emacs</command>
+    command which launches Emacs with all of your chosen packages in the
+    <varname>load-path</varname>.
+   </para>
+
+   <para>
+    You can check that it works by executing this in a terminal:
 <screen>
 $ nix-build emacs.nix
 $ ./result/bin/emacs -q
 </screen>
+    and then typing <literal>M-x package-initialize</literal>. Check that you
+    can use all the packages you want in this Emacs instance. For example, try
+    switching to the zerodark theme through <literal>M-x load-theme &lt;RET&gt;
+    zerodark &lt;RET&gt; y</literal>.
+   </para>
 
-        and then typing <literal>M-x package-initialize</literal>.
-        Check that you can use all the packages you want in this
-        Emacs instance. For example, try switching to the zerodark
-        theme through
-        <literal>M-x load-theme &lt;RET&gt; zerodark &lt;RET&gt; y</literal>.
-      </para>
-
-      <tip>
-        <para>
-          A few popular extensions worth checking out are: auctex,
-          company, edit-server, flycheck, helm, iedit, magit,
-          multiple-cursors, projectile, and yasnippet.
-        </para>
-      </tip>
-
-      <para>
-        The list of available packages in the various ELPA
-        repositories can be seen with the following commands:
-        <example xml:id="module-services-emacs-querying-packages">
-          <title>Querying Emacs packages</title>
-          <programlisting><![CDATA[
+   <tip>
+    <para>
+     A few popular extensions worth checking out are: auctex, company,
+     edit-server, flycheck, helm, iedit, magit, multiple-cursors, projectile,
+     and yasnippet.
+    </para>
+   </tip>
+
+   <para>
+    The list of available packages in the various ELPA repositories can be seen
+    with the following commands:
+    <example xml:id="module-services-emacs-querying-packages">
+     <title>Querying Emacs packages</title>
+<programlisting><![CDATA[
 nix-env -f "<nixpkgs>" -qaP -A emacsPackagesNg.elpaPackages
 nix-env -f "<nixpkgs>" -qaP -A emacsPackagesNg.melpaPackages
 nix-env -f "<nixpkgs>" -qaP -A emacsPackagesNg.melpaStablePackages
 nix-env -f "<nixpkgs>" -qaP -A emacsPackagesNg.orgPackages
 ]]></programlisting>
-        </example>
-      </para>
-
-      <para>
-        If you are on NixOS, you can install this particular Emacs for
-        all users by adding it to the list of system packages
-        (see <xref linkend="sec-declarative-package-mgmt" />). Simply
-        modify your file <filename>configuration.nix</filename> to
-        make it contain:
-        <example xml:id="module-services-emacs-configuration-nix">
-          <title>Custom Emacs in <filename>configuration.nix</filename></title>
-          <programlisting><![CDATA[
+    </example>
+   </para>
+
+   <para>
+    If you are on NixOS, you can install this particular Emacs for all users by
+    adding it to the list of system packages (see
+    <xref linkend="sec-declarative-package-mgmt" />). Simply modify your file
+    <filename>configuration.nix</filename> to make it contain:
+    <example xml:id="module-services-emacs-configuration-nix">
+     <title>Custom Emacs in <filename>configuration.nix</filename></title>
+<programlisting><![CDATA[
 {
  environment.systemPackages = [
    # [...]
@@ -301,60 +284,59 @@ nix-env -f "<nixpkgs>" -qaP -A emacsPackagesNg.orgPackages
   ];
 }
 ]]></programlisting>
-        </example>
-      </para>
+    </example>
+   </para>
 
-      <para>
-        In this case, the next <command>nixos-rebuild switch</command>
-        will take care of adding your <command>emacs</command> to the
-        <varname>PATH</varname> environment variable
-        (see <xref linkend="sec-changing-config" />).
-      </para>
+   <para>
+    In this case, the next <command>nixos-rebuild switch</command> will take
+    care of adding your <command>emacs</command> to the <varname>PATH</varname>
+    environment variable (see <xref linkend="sec-changing-config" />).
+   </para>
 
 <!-- fixme: i think the following is better done with config.nix
 https://nixos.org/nixpkgs/manual/#sec-modify-via-packageOverrides
 -->
-      <para>
-        If you are not on NixOS or want to install this particular
-        Emacs only for yourself, you can do so by adding it to your
-        <filename>~/.config/nixpkgs/config.nix</filename>
-        (see <link xlink:href="http://nixos.org/nixpkgs/manual/#sec-modify-via-packageOverrides">Nixpkgs manual</link>):
-        <example xml:id="module-services-emacs-config-nix">
-          <title>Custom Emacs in <filename>~/.config/nixpkgs/config.nix</filename></title>
-          <programlisting><![CDATA[
+
+   <para>
+    If you are not on NixOS or want to install this particular Emacs only for
+    yourself, you can do so by adding it to your
+    <filename>~/.config/nixpkgs/config.nix</filename> (see
+    <link xlink:href="http://nixos.org/nixpkgs/manual/#sec-modify-via-packageOverrides">Nixpkgs
+    manual</link>):
+    <example xml:id="module-services-emacs-config-nix">
+     <title>Custom Emacs in <filename>~/.config/nixpkgs/config.nix</filename></title>
+<programlisting><![CDATA[
 {
   packageOverrides = super: let self = super.pkgs; in {
     myemacs = import /path/to/emacs.nix { pkgs = self; };
   };
 }
 ]]></programlisting>
-        </example>
-      </para>
-
-      <para>
-        In this case, the next
-        <literal>nix-env -f '&lt;nixpkgs&gt;' -iA myemacs</literal>
-        will take care of adding your emacs to the
-        <varname>PATH</varname> environment variable.
-      </para>
-    </section>
-
-    <section xml:id="module-services-emacs-advanced">
-      <title>Advanced Emacs Configuration</title>
+    </example>
+   </para>
 
-      <para>
-        If you want, you can tweak the Emacs package itself from your
-        <filename>emacs.nix</filename>. For example, if you want to
-        have a GTK+3-based Emacs instead of the default GTK+2-based
-        binary and remove the automatically generated
-        <filename>emacs.desktop</filename> (useful is you only use
-        <command>emacsclient</command>), you can change your file
-        <filename>emacs.nix</filename> in this way:
-      </para>
+   <para>
+    In this case, the next <literal>nix-env -f '&lt;nixpkgs&gt;' -iA
+    myemacs</literal> will take care of adding your emacs to the
+    <varname>PATH</varname> environment variable.
+   </para>
+  </section>
 
-      <example xml:id="ex-emacsGtk3Nix">
-        <title>Custom Emacs build</title>
-        <programlisting><![CDATA[
+  <section xml:id="module-services-emacs-advanced">
+   <title>Advanced Emacs Configuration</title>
+
+   <para>
+    If you want, you can tweak the Emacs package itself from your
+    <filename>emacs.nix</filename>. For example, if you want to have a
+    GTK+3-based Emacs instead of the default GTK+2-based binary and remove the
+    automatically generated <filename>emacs.desktop</filename> (useful is you
+    only use <command>emacsclient</command>), you can change your file
+    <filename>emacs.nix</filename> in this way:
+   </para>
+
+   <example xml:id="ex-emacsGtk3Nix">
+    <title>Custom Emacs build</title>
+<programlisting><![CDATA[
 { pkgs ? import <nixpkgs> {} }:
 let
   myEmacs = (pkgs.emacs.override {
@@ -370,161 +352,143 @@ let
   });
 in [...]
 ]]></programlisting>
-      </example>
+   </example>
 
-      <para>
-        After building this file as shown in <xref linkend="ex-emacsNix" />,
-        you will get an GTK3-based Emacs binary pre-loaded with your
-        favorite packages.
-      </para>
-    </section>
+   <para>
+    After building this file as shown in <xref linkend="ex-emacsNix" />, you
+    will get an GTK3-based Emacs binary pre-loaded with your favorite packages.
+   </para>
   </section>
-
-<section xml:id="module-services-emacs-running">
+ </section>
+ <section xml:id="module-services-emacs-running">
   <title>Running Emacs as a Service</title>
+
   <para>
-    <productname>NixOS</productname> provides an optional
-    <command>systemd</command> service which launches
-    <link xlink:href="https://www.gnu.org/software/emacs/manual/html_node/emacs/Emacs-Server.html">
-      Emacs daemon
-    </link>
-    with the user's login session.
+   <productname>NixOS</productname> provides an optional
+   <command>systemd</command> service which launches
+   <link xlink:href="https://www.gnu.org/software/emacs/manual/html_node/emacs/Emacs-Server.html">
+   Emacs daemon </link> with the user's login session.
   </para>
 
   <para>
-    <emphasis>Source:</emphasis>
-    <filename>modules/services/editors/emacs.nix</filename>
+   <emphasis>Source:</emphasis>
+   <filename>modules/services/editors/emacs.nix</filename>
   </para>
 
   <section xml:id="module-services-emacs-enabling">
-    <title>Enabling the Service</title>
-
-    <para>
-      To install and enable the <command>systemd</command>
-      user service for Emacs daemon, add the following to your
-      <filename>configuration.nix</filename>:
+   <title>Enabling the Service</title>
 
+   <para>
+    To install and enable the <command>systemd</command> user service for Emacs
+    daemon, add the following to your <filename>configuration.nix</filename>:
 <programlisting>
 <xref linkend="opt-services.emacs.enable"/> = true;
 <xref linkend="opt-services.emacs.package"/> = import /home/cassou/.emacs.d { pkgs = pkgs; };
 </programlisting>
-    </para>
-
-    <para>
-      The <varname>services.emacs.package</varname> option allows a
-      custom derivation to be used, for example, one created by
-      <function>emacsWithPackages</function>.
-    </para>
-
-    <para>
-      Ensure that the Emacs server is enabled for your user's Emacs
-      configuration, either by customizing the
-      <varname>server-mode</varname> variable, or by adding
-      <literal>(server-start)</literal> to
-      <filename>~/.emacs.d/init.el</filename>.
-    </para>
-
-    <para>
-      To start the daemon, execute the following:
-
+   </para>
+
+   <para>
+    The <varname>services.emacs.package</varname> option allows a custom
+    derivation to be used, for example, one created by
+    <function>emacsWithPackages</function>.
+   </para>
+
+   <para>
+    Ensure that the Emacs server is enabled for your user's Emacs
+    configuration, either by customizing the <varname>server-mode</varname>
+    variable, or by adding <literal>(server-start)</literal> to
+    <filename>~/.emacs.d/init.el</filename>.
+   </para>
+
+   <para>
+    To start the daemon, execute the following:
 <screen>
 $ nixos-rebuild switch  # to activate the new configuration.nix
 $ systemctl --user daemon-reload        # to force systemd reload
 $ systemctl --user start emacs.service  # to start the Emacs daemon
 </screen>
-
-      The server should now be ready to serve Emacs clients.
-    </para>
-
+    The server should now be ready to serve Emacs clients.
+   </para>
   </section>
 
   <section xml:id="module-services-emacs-starting-client">
-    <title>Starting the client</title>
-    <para>
-      Ensure that the emacs server is enabled, either by customizing
-      the <varname>server-mode</varname> variable, or by adding
-      <literal>(server-start)</literal> to
-      <filename>~/.emacs</filename>.
-    </para>
+   <title>Starting the client</title>
 
-    <para>
-      To connect to the emacs daemon, run one of the following:
-      <programlisting><![CDATA[
+   <para>
+    Ensure that the emacs server is enabled, either by customizing the
+    <varname>server-mode</varname> variable, or by adding
+    <literal>(server-start)</literal> to <filename>~/.emacs</filename>.
+   </para>
+
+   <para>
+    To connect to the emacs daemon, run one of the following:
+<programlisting><![CDATA[
 emacsclient FILENAME
 emacsclient --create-frame  # opens a new frame (window)
 emacsclient --create-frame --tty  # opens a new frame on the current terminal
 ]]></programlisting>
-    </para>
+   </para>
   </section>
 
   <section xml:id="module-services-emacs-editor-variable">
-    <title>Configuring the <varname>EDITOR</varname> variable</title>
-    <!--<title><command>emacsclient</command> as the Default Editor</title>-->
-
-    <para>
-      If <xref linkend="opt-services.emacs.defaultEditor"/> is
-      <literal>true</literal>, the <varname>EDITOR</varname> variable
-      will be set to a wrapper script which launches
-      <command>emacsclient</command>.
-    </para>
-
-    <para>
-      Any setting of <varname>EDITOR</varname> in the shell config
-      files will override
-      <varname>services.emacs.defaultEditor</varname>.
-      To make sure <varname>EDITOR</varname> refers to the Emacs
-      wrapper script, remove any existing <varname>EDITOR</varname>
-      assignment from <filename>.profile</filename>,
-      <filename>.bashrc</filename>, <filename>.zshenv</filename> or
-      any other shell config file.
-    </para>
-
-    <para>
-      If you have formed certain bad habits when editing files,
-      these can be corrected with a shell alias to the wrapper
-      script:
-      <programlisting>alias vi=$EDITOR</programlisting>
-    </para>
+   <title>Configuring the <varname>EDITOR</varname> variable</title>
+
+<!--<title><command>emacsclient</command> as the Default Editor</title>-->
+
+   <para>
+    If <xref linkend="opt-services.emacs.defaultEditor"/> is
+    <literal>true</literal>, the <varname>EDITOR</varname> variable will be set
+    to a wrapper script which launches <command>emacsclient</command>.
+   </para>
+
+   <para>
+    Any setting of <varname>EDITOR</varname> in the shell config files will
+    override <varname>services.emacs.defaultEditor</varname>. To make sure
+    <varname>EDITOR</varname> refers to the Emacs wrapper script, remove any
+    existing <varname>EDITOR</varname> assignment from
+    <filename>.profile</filename>, <filename>.bashrc</filename>,
+    <filename>.zshenv</filename> or any other shell config file.
+   </para>
+
+   <para>
+    If you have formed certain bad habits when editing files, these can be
+    corrected with a shell alias to the wrapper script:
+<programlisting>alias vi=$EDITOR</programlisting>
+   </para>
   </section>
 
   <section xml:id="module-services-emacs-per-user">
-    <title>Per-User Enabling of the Service</title>
-
-    <para>
-      In general, <command>systemd</command> user services
-      are globally enabled by symlinks in
-      <filename>/etc/systemd/user</filename>. In the case where
-      Emacs daemon is not wanted for all users, it is possible to
-      install the service but not globally enable it:
+   <title>Per-User Enabling of the Service</title>
 
+   <para>
+    In general, <command>systemd</command> user services are globally enabled
+    by symlinks in <filename>/etc/systemd/user</filename>. In the case where
+    Emacs daemon is not wanted for all users, it is possible to install the
+    service but not globally enable it:
 <programlisting>
 <xref linkend="opt-services.emacs.enable"/> = false;
 <xref linkend="opt-services.emacs.install"/> = true;
 </programlisting>
-    </para>
-
-    <para>
-      To enable the <command>systemd</command> user service for just
-      the currently logged in user, run:
-
-      <programlisting>systemctl --user enable emacs</programlisting>
-
-      This will add the symlink
-      <filename>~/.config/systemd/user/emacs.service</filename>.
-    </para>
+   </para>
+
+   <para>
+    To enable the <command>systemd</command> user service for just the
+    currently logged in user, run:
+<programlisting>systemctl --user enable emacs</programlisting>
+    This will add the symlink
+    <filename>~/.config/systemd/user/emacs.service</filename>.
+   </para>
   </section>
-</section>
-
-<section xml:id="module-services-emacs-configuring">
+ </section>
+ <section xml:id="module-services-emacs-configuring">
   <title>Configuring Emacs</title>
 
   <para>
-    The Emacs init file should be changed to load the extension
-    packages at startup:
-
-    <example xml:id="module-services-emacs-package-initialisation">
-      <title>Package initialization in <filename>.emacs</filename></title>
-      <programlisting><![CDATA[
+   The Emacs init file should be changed to load the extension packages at
+   startup:
+   <example xml:id="module-services-emacs-package-initialisation">
+    <title>Package initialization in <filename>.emacs</filename></title>
+<programlisting><![CDATA[
 (require 'package)
 
 ;; optional. makes unpure packages archives unavailable
@@ -533,66 +497,71 @@ emacsclient --create-frame --tty  # opens a new frame on the current terminal
 (setq package-enable-at-startup nil)
 (package-initialize)
 ]]></programlisting>
-    </example>
+   </example>
   </para>
 
   <para>
-    After the declarative emacs package configuration has been
-    tested, previously downloaded packages can be cleaned up by
-    removing <filename>~/.emacs.d/elpa</filename> (do make a backup
-    first, in case you forgot a package).
+   After the declarative emacs package configuration has been tested,
+   previously downloaded packages can be cleaned up by removing
+   <filename>~/.emacs.d/elpa</filename> (do make a backup first, in case you
+   forgot a package).
   </para>
 
-  <!--
+<!--
       todo: is it worth documenting customizations for
       server-switch-hook, server-done-hook?
   -->
 
   <section xml:id="module-services-emacs-major-mode">
-    <title>A Major Mode for Nix Expressions</title>
+   <title>A Major Mode for Nix Expressions</title>
 
-    <para>
-      Of interest may be <varname>melpaPackages.nix-mode</varname>,
-      which provides syntax highlighting for the Nix language. This is
-      particularly convenient if you regularly edit Nix files.
-    </para>
+   <para>
+    Of interest may be <varname>melpaPackages.nix-mode</varname>, which
+    provides syntax highlighting for the Nix language. This is particularly
+    convenient if you regularly edit Nix files.
+   </para>
   </section>
 
   <section xml:id="module-services-emacs-man-pages">
-    <title>Accessing man pages</title>
-    <para>
-      You can use <function>woman</function> to get completion of all
-      available man pages. For example, type <literal>M-x woman
-      &lt;RET&gt; nixos-rebuild &lt;RET&gt;.</literal>
-    </para>
+   <title>Accessing man pages</title>
+
+   <para>
+    You can use <function>woman</function> to get completion of all available
+    man pages. For example, type <literal>M-x woman &lt;RET&gt; nixos-rebuild
+    &lt;RET&gt;.</literal>
+   </para>
   </section>
 
   <section xml:id="sec-emacs-docbook-xml">
-    <title>Editing DocBook 5 XML Documents</title>
-    <para>
-      Emacs includes <link
-      xlink:href="https://www.gnu.org/software/emacs/manual/html_node/nxml-mode/Introduction.html">nXML</link>,
-      a major-mode for validating and editing XML documents.
-      When editing DocBook 5.0 documents, such as
-      <link linkend="book-nixos-manual">this one</link>,
-      nXML needs to be configured with the relevant schema, which is
-      not included.
-    </para>
+   <title>Editing DocBook 5 XML Documents</title>
 
-    <para>
-      To install the DocBook 5.0 schemas, either add
-      <varname>pkgs.docbook5</varname> to
-      <xref linkend="opt-environment.systemPackages"/> (<link
+   <para>
+    Emacs includes
+    <link
+      xlink:href="https://www.gnu.org/software/emacs/manual/html_node/nxml-mode/Introduction.html">nXML</link>,
+    a major-mode for validating and editing XML documents. When editing DocBook
+    5.0 documents, such as <link linkend="book-nixos-manual">this one</link>,
+    nXML needs to be configured with the relevant schema, which is not
+    included.
+   </para>
+
+   <para>
+    To install the DocBook 5.0 schemas, either add
+    <varname>pkgs.docbook5</varname> to
+    <xref linkend="opt-environment.systemPackages"/>
+    (<link
       linkend="sec-declarative-package-mgmt">NixOS</link>), or run
-      <literal>nix-env -i pkgs.docbook5</literal>
-      (<link linkend="sec-ad-hoc-packages">Nix</link>).
-    </para>
-
-    <para>
-      Then customize the variable <varname>rng-schema-locating-files</varname> to include <filename>~/.emacs.d/schemas.xml</filename> and put the following text into that file:
-      <example xml:id="ex-emacs-docbook-xml">
-        <title>nXML Schema Configuration (<filename>~/.emacs.d/schemas.xml</filename>)</title>
-        <programlisting language="xml"><![CDATA[
+    <literal>nix-env -i pkgs.docbook5</literal>
+    (<link linkend="sec-ad-hoc-packages">Nix</link>).
+   </para>
+
+   <para>
+    Then customize the variable <varname>rng-schema-locating-files</varname> to
+    include <filename>~/.emacs.d/schemas.xml</filename> and put the following
+    text into that file:
+    <example xml:id="ex-emacs-docbook-xml">
+     <title>nXML Schema Configuration (<filename>~/.emacs.d/schemas.xml</filename>)</title>
+<programlisting language="xml"><![CDATA[
 <?xml version="1.0"?>
 <!--
   To let emacs find this file, evaluate:
@@ -612,9 +581,7 @@ emacsclient --create-frame --tty  # opens a new frame on the current terminal
 </locatingRules>
 ]]></programlisting>
     </example>
-  </para>
-
+   </para>
   </section>
-</section>
-
+ </section>
 </chapter>
diff --git a/nixos/modules/services/hardware/triggerhappy.nix b/nixos/modules/services/hardware/triggerhappy.nix
new file mode 100644
index 000000000000..81d4a1ae65bf
--- /dev/null
+++ b/nixos/modules/services/hardware/triggerhappy.nix
@@ -0,0 +1,114 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.triggerhappy;
+
+  socket = "/run/thd.socket";
+
+  configFile = pkgs.writeText "triggerhappy.conf" ''
+    ${concatMapStringsSep "\n"
+      ({ keys, event, cmd, ... }:
+        ''${concatMapStringsSep "+" (x: "KEY_" + x) keys} ${toString { press = 1; hold = 2; release = 0; }.${event}} ${cmd}''
+      )
+      cfg.bindings}
+    ${cfg.extraConfig}
+  '';
+
+  bindingCfg = { config, ... }: {
+    options = {
+
+      keys = mkOption {
+        type = types.listOf types.str;
+        description = "List of keys to match.  Key names as defined in linux/input-event-codes.h";
+      };
+
+      event = mkOption {
+        type = types.enum ["press" "hold" "release"];
+        default = "press";
+        description = "Event to match.";
+      };
+
+      cmd = mkOption {
+        type = types.str;
+        description = "What to run.";
+      };
+
+    };
+  };
+
+in
+
+{
+
+  ###### interface
+
+  options = {
+
+    services.triggerhappy = {
+
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to enable the <command>triggerhappy</command> hotkey daemon.
+        '';
+      };
+
+      bindings = mkOption {
+        type = types.listOf (types.submodule bindingCfg);
+        default = [];
+        example = lib.literalExample ''
+          [ { keys = ["PLAYPAUSE"];  cmd = "''${pkgs.mpc_cli}/bin/mpc -q toggle"; } ]
+        '';
+        description = ''
+          Key bindings for <command>triggerhappy</command>.
+        '';
+      };
+
+      extraConfig = mkOption {
+        type = types.lines;
+        default = "";
+        description = ''
+          Literal contents to append to the end of <command>triggerhappy</command> configuration file.
+        '';
+      };
+
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+
+    systemd.sockets.triggerhappy = {
+      description = "Triggerhappy Socket";
+      wantedBy = [ "sockets.target" ];
+      socketConfig.ListenDatagram = socket;
+    };
+
+    systemd.services.triggerhappy = {
+      wantedBy = [ "multi-user.target" ];
+      after = [ "local-fs.target" ];
+      description = "Global hotkey daemon";
+      serviceConfig = {
+        ExecStart = "${pkgs.triggerhappy}/bin/thd --user nobody --socket ${socket} --triggers ${configFile} --deviceglob /dev/input/event*";
+      };
+    };
+
+    services.udev.packages = lib.singleton (pkgs.writeTextFile {
+      name = "triggerhappy-udev-rules";
+      destination = "/etc/udev/rules.d/61-triggerhappy.rules";
+      text = ''
+        ACTION=="add", SUBSYSTEM=="input", KERNEL=="event[0-9]*", ATTRS{name}!="triggerhappy", \
+          RUN+="${pkgs.triggerhappy}/bin/th-cmd --socket ${socket} --passfd --udev"
+      '';
+    });
+
+  };
+
+}
diff --git a/nixos/modules/services/logging/journaldriver.nix b/nixos/modules/services/logging/journaldriver.nix
index 74ac3d4c2365..9bd581e9ec0e 100644
--- a/nixos/modules/services/logging/journaldriver.nix
+++ b/nixos/modules/services/logging/journaldriver.nix
@@ -7,7 +7,7 @@
 # to be set.
 #
 # For further information please consult the documentation in the
-# upstream repository at: https://github.com/aprilabank/journaldriver/
+# upstream repository at: https://github.com/tazjin/journaldriver/
 
 { config, lib, pkgs, ...}:
 
diff --git a/nixos/modules/services/mail/rspamd.nix b/nixos/modules/services/mail/rspamd.nix
index b3dae60c2c7e..bba11796a3d3 100644
--- a/nixos/modules/services/mail/rspamd.nix
+++ b/nixos/modules/services/mail/rspamd.nix
@@ -115,36 +115,10 @@ let
     };
   };
 
-  indexOf = default: start: list: e:
-    if list == []
-    then default
-    else if (head list) == e then start
-    else (indexOf default (start + (length (listenStreams (head list).socket))) (tail list) e);
-
-  systemdSocket = indexOf (abort "Socket not found") 0 allSockets;
-
   isUnixSocket = socket: hasPrefix "/" (if (isString socket) then socket else socket.socket);
-  isPort = hasPrefix "*:";
-  isIPv4Socket = hasPrefix "*v4:";
-  isIPv6Socket = hasPrefix "*v6:";
-  isLocalHost = hasPrefix "localhost:";
-  listenStreams = socket:
-    if (isLocalHost socket) then
-      let port = (removePrefix "localhost:" socket);
-      in [ "127.0.0.1:${port}" ] ++ (if config.networking.enableIPv6 then ["[::1]:${port}"] else [])
-    else if (isIPv6Socket socket) then [removePrefix "*v6:" socket]
-    else if (isPort socket) then [removePrefix "*:" socket]
-    else if (isIPv4Socket socket) then
-      throw "error: IPv4 only socket not supported in rspamd with socket activation"
-    else if (length (splitString " " socket)) != 1 then
-      throw "error: string options not supported in rspamd with socket activation"
-    else [socket];
-
-  mkBindSockets = enabled: socks: concatStringsSep "\n  " (flatten (map (each:
-    if cfg.socketActivation && enabled != false then
-      let systemd = (systemdSocket each);
-      in (imap (idx: e: "bind_socket = \"systemd:${toString (systemd + idx - 1)}\";") (listenStreams each.socket))
-    else "bind_socket = \"${each.rawEntry}\";") socks));
+
+  mkBindSockets = enabled: socks: concatStringsSep "\n  "
+    (flatten (map (each: "bind_socket = \"${each.rawEntry}\";") socks));
 
   rspamdConfFile = pkgs.writeText "rspamd.conf"
     ''
@@ -175,18 +149,6 @@ let
       ${cfg.extraConfig}
    '';
 
-  allMappedSockets = flatten (mapAttrsToList (name: value:
-    if value.enable != false
-    then imap (idx: each: {
-        name = "${name}";
-        index = idx;
-        value = each;
-      }) value.bindSockets
-    else []) cfg.workers);
-  allSockets = map (e: e.value) allMappedSockets;
-
-  allSocketNames = map (each: "rspamd-${each.name}-${toString each.index}.socket") allMappedSockets;
-
 in
 
 {
@@ -205,13 +167,6 @@ in
         description = "Whether to run the rspamd daemon in debug mode.";
       };
 
-      socketActivation = mkOption {
-        type = types.bool;
-        description = ''
-          Enable systemd socket activation for rspamd.
-        '';
-      };
-
       workers = mkOption {
         type = with types; attrsOf (submodule workerOpts);
         description = ''
@@ -272,13 +227,6 @@ in
 
   config = mkIf cfg.enable {
 
-    services.rspamd.socketActivation = mkDefault (!opts.bindSocket.isDefined && !opts.bindUISocket.isDefined);
-
-    assertions = [ {
-      assertion = !cfg.socketActivation || !(opts.bindSocket.isDefined || opts.bindUISocket.isDefined);
-      message = "Can't use socketActivation for rspamd when using renamed bind socket options";
-    } ];
-
     # Allow users to run 'rspamc' and 'rspamadm'.
     environment.systemPackages = [ pkgs.rspamd ];
 
@@ -299,17 +247,14 @@ in
     systemd.services.rspamd = {
       description = "Rspamd Service";
 
-      wantedBy = mkIf (!cfg.socketActivation) [ "multi-user.target" ];
-      after = [ "network.target" ] ++
-       (if cfg.socketActivation then allSocketNames else []);
-      requires = mkIf cfg.socketActivation allSocketNames;
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
 
       serviceConfig = {
         ExecStart = "${pkgs.rspamd}/bin/rspamd ${optionalString cfg.debug "-d"} --user=${cfg.user} --group=${cfg.group} --pid=/run/rspamd.pid -c ${rspamdConfFile} -f";
         Restart = "always";
         RuntimeDirectory = "rspamd";
         PrivateTmp = true;
-        Sockets = mkIf cfg.socketActivation (concatStringsSep " " allSocketNames);
       };
 
       preStart = ''
@@ -317,24 +262,10 @@ in
         ${pkgs.coreutils}/bin/chown ${cfg.user}:${cfg.group} /var/lib/rspamd
       '';
     };
-    systemd.sockets = mkIf cfg.socketActivation
-      (listToAttrs (map (each: {
-        name = "rspamd-${each.name}-${toString each.index}";
-        value = {
-          description = "Rspamd socket ${toString each.index} for worker ${each.name}";
-          wantedBy = [ "sockets.target" ];
-          listenStreams = (listenStreams each.value.socket);
-          socketConfig = {
-            BindIPv6Only = mkIf (isIPv6Socket each.value.socket) "ipv6-only";
-            Service = "rspamd.service";
-            SocketUser = mkIf (isUnixSocket each.value.socket) each.value.owner;
-            SocketGroup = mkIf (isUnixSocket each.value.socket) each.value.group;
-            SocketMode = mkIf (isUnixSocket each.value.socket) each.value.mode;
-          };
-        };
-      }) allMappedSockets));
   };
   imports = [
+    (mkRemovedOptionModule [ "services" "rspamd" "socketActivation" ]
+	     "Socket activation never worked correctly and could at this time not be fixed and so was removed")
     (mkRenamedOptionModule [ "services" "rspamd" "bindSocket" ] [ "services" "rspamd" "workers" "normal" "bindSockets" ])
     (mkRenamedOptionModule [ "services" "rspamd" "bindUISocket" ] [ "services" "rspamd" "workers" "controller" "bindSockets" ])
   ];
diff --git a/nixos/modules/services/misc/emby.nix b/nixos/modules/services/misc/emby.nix
index ff68b850cd91..0ad4a3f7376f 100644
--- a/nixos/modules/services/misc/emby.nix
+++ b/nixos/modules/services/misc/emby.nix
@@ -55,7 +55,7 @@ in
         User = cfg.user;
         Group = cfg.group;
         PermissionsStartOnly = "true";
-        ExecStart = "${pkgs.emby}/bin/MediaBrowser.Server.Mono";
+        ExecStart = "${pkgs.emby}/bin/emby -programdata ${cfg.dataDir}";
         Restart = "on-failure";
       };
     };
diff --git a/nixos/modules/services/misc/gitlab.xml b/nixos/modules/services/misc/gitlab.xml
index 67b9f1d3e474..ab99d7bd3a60 100644
--- a/nixos/modules/services/misc/gitlab.xml
+++ b/nixos/modules/services/misc/gitlab.xml
@@ -3,20 +3,22 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="module-services-gitlab">
-
-<title>Gitlab</title>
-
-<para>Gitlab is a feature-rich git hosting service.</para>
-
-<section xml:id="module-services-gitlab-prerequisites"><title>Prerequisites</title>
-
-<para>The gitlab service exposes only an Unix socket at
-<literal>/run/gitlab/gitlab-workhorse.socket</literal>. You need to configure a
-webserver to proxy HTTP requests to the socket.</para>
-
-<para>For instance, the following configuration could be used to use nginx as
-    frontend proxy:
-
+ <title>Gitlab</title>
+ <para>
+  Gitlab is a feature-rich git hosting service.
+ </para>
+ <section xml:id="module-services-gitlab-prerequisites">
+  <title>Prerequisites</title>
+
+  <para>
+   The gitlab service exposes only an Unix socket at
+   <literal>/run/gitlab/gitlab-workhorse.socket</literal>. You need to
+   configure a webserver to proxy HTTP requests to the socket.
+  </para>
+
+  <para>
+   For instance, the following configuration could be used to use nginx as
+   frontend proxy:
 <programlisting>
 <link linkend="opt-services.nginx.enable">services.nginx</link> = {
   <link linkend="opt-services.nginx.enable">enable</link> = true;
@@ -31,21 +33,24 @@ webserver to proxy HTTP requests to the socket.</para>
   };
 };
 </programlisting>
-</para>
-
-</section>
-
-<section xml:id="module-services-gitlab-configuring"><title>Configuring</title>
-
-<para>Gitlab depends on both PostgreSQL and Redis and will automatically enable
-both services. In the case of PostgreSQL, a database and a role will be created.
-</para>
-
-<para>The default state dir is <literal>/var/gitlab/state</literal>. This is where
-all data like the repositories and uploads will be stored.</para>
-
-<para>A basic configuration with some custom settings could look like this:
-
+  </para>
+ </section>
+ <section xml:id="module-services-gitlab-configuring">
+  <title>Configuring</title>
+
+  <para>
+   Gitlab depends on both PostgreSQL and Redis and will automatically enable
+   both services. In the case of PostgreSQL, a database and a role will be
+   created.
+  </para>
+
+  <para>
+   The default state dir is <literal>/var/gitlab/state</literal>. This is where
+   all data like the repositories and uploads will be stored.
+  </para>
+
+  <para>
+   A basic configuration with some custom settings could look like this:
 <programlisting>
 services.gitlab = {
   <link linkend="opt-services.gitlab.enable">enable</link> = true;
@@ -105,40 +110,41 @@ services.gitlab = {
   };
 };
 </programlisting>
-</para>
-
-<para>If you're setting up a new Gitlab instance, generate new secrets. You
-for instance use <literal>tr -dc A-Za-z0-9 &lt; /dev/urandom | head -c 128</literal>
-to generate a new secret. Gitlab encrypts sensitive data stored in the database.
-If you're restoring an existing Gitlab instance, you must specify the secrets
-secret from <literal>config/secrets.yml</literal> located in your Gitlab state
-folder.</para>
-
-<para>Refer to <xref linkend="ch-options" /> for all available configuration
-options for the <link linkend="opt-services.gitlab.enable">services.gitlab</link> module.</para>
-
-</section>
-
-<section xml:id="module-services-gitlab-maintenance"><title>Maintenance</title>
-
-<para>You can run Gitlab's rake tasks with <literal>gitlab-rake</literal>
-which will be available on the system when gitlab is enabled. You will
-have to run the command as the user that you configured to run gitlab
-with.</para>
-
-<para>For example, to backup a Gitlab instance:
-
+  </para>
+
+  <para>
+   If you're setting up a new Gitlab instance, generate new secrets. You for
+   instance use <literal>tr -dc A-Za-z0-9 &lt; /dev/urandom | head -c
+   128</literal> to generate a new secret. Gitlab encrypts sensitive data
+   stored in the database. If you're restoring an existing Gitlab instance, you
+   must specify the secrets secret from <literal>config/secrets.yml</literal>
+   located in your Gitlab state folder.
+  </para>
+
+  <para>
+   Refer to <xref linkend="ch-options" /> for all available configuration
+   options for the
+   <link linkend="opt-services.gitlab.enable">services.gitlab</link> module.
+  </para>
+ </section>
+ <section xml:id="module-services-gitlab-maintenance">
+  <title>Maintenance</title>
+
+  <para>
+   You can run Gitlab's rake tasks with <literal>gitlab-rake</literal> which
+   will be available on the system when gitlab is enabled. You will have to run
+   the command as the user that you configured to run gitlab with.
+  </para>
+
+  <para>
+   For example, to backup a Gitlab instance:
 <programlisting>
 $ sudo -u git -H gitlab-rake gitlab:backup:create
 </programlisting>
-
-A list of all availabe rake tasks can be obtained by running:
-
+   A list of all availabe rake tasks can be obtained by running:
 <programlisting>
 $ sudo -u git -H gitlab-rake -T
 </programlisting>
-</para>
-
-</section>
-
+  </para>
+ </section>
 </chapter>
diff --git a/nixos/modules/services/misc/lidarr.nix b/nixos/modules/services/misc/lidarr.nix
new file mode 100644
index 000000000000..627f22334fe8
--- /dev/null
+++ b/nixos/modules/services/misc/lidarr.nix
@@ -0,0 +1,46 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+  cfg = config.services.lidarr;
+in
+{
+  options = {
+    services.lidarr = {
+      enable = mkEnableOption "Lidarr";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.lidarr = {
+      description = "Lidarr";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+      preStart = ''
+        [ ! -d /var/lib/lidarr ] && mkdir -p /var/lib/lidarr
+        chown -R lidarr:lidarr /var/lib/lidarr
+      '';
+
+      serviceConfig = {
+        Type = "simple";
+        User = "lidarr";
+        Group = "lidarr";
+        PermissionsStartOnly = "true";
+        ExecStart = "${pkgs.lidarr}/bin/Lidarr";
+        Restart = "on-failure";
+
+        StateDirectory = "/var/lib/lidarr/";
+        StateDirectoryMode = "0770";
+      };
+    };
+
+    users.users.lidarr = {
+      uid = config.ids.uids.lidarr;
+      home = "/var/lib/lidarr";
+      group = "lidarr";
+    };
+
+    users.groups.lidarr.gid = config.ids.gids.lidarr;
+  };
+}
diff --git a/nixos/modules/services/misc/nix-daemon.nix b/nixos/modules/services/misc/nix-daemon.nix
index c0eb882c58f3..24379ec27354 100644
--- a/nixos/modules/services/misc/nix-daemon.nix
+++ b/nixos/modules/services/misc/nix-daemon.nix
@@ -345,7 +345,6 @@ in
         type = types.listOf types.str;
         default =
           [
-            "$HOME/.nix-defexpr/channels"
             "nixpkgs=/nix/var/nix/profiles/per-user/root/channels/nixos"
             "nixos-config=/etc/nixos/configuration.nix"
             "/nix/var/nix/profiles/per-user/root/channels"
@@ -436,7 +435,7 @@ in
 
     # Set up the environment variables for running Nix.
     environment.sessionVariables = cfg.envVars //
-      { NIX_PATH = concatStringsSep ":" cfg.nixPath;
+      { NIX_PATH = cfg.nixPath;
       };
 
     environment.extraInit = optionalString (!isNix20)
@@ -446,6 +445,10 @@ in
         if [ "$USER" != root -o ! -w /nix/var/nix/db ]; then
             export NIX_REMOTE=daemon
         fi
+      '' + ''
+        if [ -e "$HOME/.nix-defexpr/channels" ]; then
+          export NIX_PATH="$HOME/.nix-defexpr/channels''${NIX_PATH:+:$NIX_PATH}"
+        fi
       '';
 
     nix.nrBuildUsers = mkDefault (lib.max 32 cfg.maxJobs);
diff --git a/nixos/modules/services/misc/nix-optimise.nix b/nixos/modules/services/misc/nix-optimise.nix
index 6f75e4dd03ea..416529f690e0 100644
--- a/nixos/modules/services/misc/nix-optimise.nix
+++ b/nixos/modules/services/misc/nix-optimise.nix
@@ -40,6 +40,8 @@ in
 
     systemd.services.nix-optimise =
       { description = "Nix Store Optimiser";
+        # No point running it inside a nixos-container. It should be on the host instead.
+        unitConfig.ConditionVirtualization = "!container";
         serviceConfig.ExecStart = "${config.nix.package}/bin/nix-store --optimise";
         startAt = optionals cfg.automatic cfg.dates;
       };
diff --git a/nixos/modules/services/misc/sickbeard.nix b/nixos/modules/services/misc/sickbeard.nix
new file mode 100644
index 000000000000..5cfbbe516ae1
--- /dev/null
+++ b/nixos/modules/services/misc/sickbeard.nix
@@ -0,0 +1,92 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  name = "sickbeard";
+
+  cfg = config.services.sickbeard;
+  sickbeard = cfg.package;
+
+in
+{
+
+  ###### interface
+
+  options = {
+    services.sickbeard = {
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Whether to enable the sickbeard server.";
+      };
+      package = mkOption {
+        type = types.package;
+        default = pkgs.sickbeard;
+        example = literalExample "pkgs.sickrage";
+        description =''
+          Enable <literal>pkgs.sickrage</literal> or <literal>pkgs.sickgear</literal>
+          as an alternative to SickBeard
+        '';
+      };
+      dataDir = mkOption {
+        type = types.path;
+        default = "/var/lib/${name}";
+        description = "Path where to store data files.";
+      };
+      configFile = mkOption {
+        type = types.path;
+        default = "${cfg.dataDir}/config.ini";
+        description = "Path to config file.";
+      };
+      port = mkOption {
+        type = types.ints.u16;
+        default = 8081;
+        description = "Port to bind to.";
+      };
+      user = mkOption {
+        type = types.str;
+        default = name;
+        description = "User to run the service as";
+      };
+      group = mkOption {
+        type = types.str;
+        default = name;
+        description = "Group to run the service as";
+      };
+    };
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+
+    users.users = optionalAttrs (cfg.user == name) (singleton {
+      name = name;
+      uid = config.ids.uids.sickbeard;
+      group = cfg.group;
+      description = "sickbeard user";
+      home = cfg.dataDir;
+      createHome = true;
+    });
+
+    users.groups = optionalAttrs (cfg.group == name) (singleton {
+      name = name;
+      gid = config.ids.gids.sickbeard;
+    });
+
+    systemd.services.sickbeard = {
+      description = "Sickbeard Server";
+      wantedBy    = [ "multi-user.target" ];
+      after = [ "network.target" ];
+
+      serviceConfig = {
+        User = cfg.user;
+        Group = cfg.group;
+        ExecStart = "${sickbeard}/SickBeard.py --datadir ${cfg.dataDir} --config ${cfg.configFile} --port ${toString cfg.port}";
+      };
+    };
+  };
+}
diff --git a/nixos/modules/services/misc/taskserver/doc.xml b/nixos/modules/services/misc/taskserver/doc.xml
index 21d25ecf391f..5eac8d9ef784 100644
--- a/nixos/modules/services/misc/taskserver/doc.xml
+++ b/nixos/modules/services/misc/taskserver/doc.xml
@@ -2,101 +2,93 @@
     xmlns:xlink="http://www.w3.org/1999/xlink"
     version="5.0"
     xml:id="module-taskserver">
-
-  <title>Taskserver</title>
+ <title>Taskserver</title>
+ <para>
+  Taskserver is the server component of
+  <link xlink:href="https://taskwarrior.org/">Taskwarrior</link>, a free and
+  open source todo list application.
+ </para>
+ <para>
+  <emphasis>Upstream documentation:</emphasis>
+  <link xlink:href="https://taskwarrior.org/docs/#taskd"/>
+ </para>
+ <section xml:id="module-services-taskserver-configuration">
+  <title>Configuration</title>
 
   <para>
-    Taskserver is the server component of
-    <link xlink:href="https://taskwarrior.org/">Taskwarrior</link>, a free and
-    open source todo list application.
+   Taskserver does all of its authentication via TLS using client certificates,
+   so you either need to roll your own CA or purchase a certificate from a
+   known CA, which allows creation of client certificates. These certificates
+   are usually advertised as <quote>server certificates</quote>.
   </para>
 
   <para>
-    <emphasis>Upstream documentation:</emphasis>
-    <link xlink:href="https://taskwarrior.org/docs/#taskd"/>
+   So in order to make it easier to handle your own CA, there is a helper tool
+   called <command>nixos-taskserver</command> which manages the custom CA along
+   with Taskserver organisations, users and groups.
   </para>
 
-  <section xml:id="module-services-taskserver-configuration">
-    <title>Configuration</title>
-
-    <para>
-      Taskserver does all of its authentication via TLS using client
-      certificates, so you either need to roll your own CA or purchase a
-      certificate from a known CA, which allows creation of client
-      certificates.
-
-      These certificates are usually advertised as
-      <quote>server certificates</quote>.
-    </para>
-
-    <para>
-      So in order to make it easier to handle your own CA, there is a helper
-      tool called <command>nixos-taskserver</command> which manages the custom
-      CA along with Taskserver organisations, users and groups.
-    </para>
-
-    <para>
-      While the client certificates in Taskserver only authenticate whether a
-      user is allowed to connect, every user has its own UUID which identifies
-      it as an entity.
-    </para>
-
-    <para>
-      With <command>nixos-taskserver</command> the client certificate is created
-      along with the UUID of the user, so it handles all of the credentials
-      needed in order to setup the Taskwarrior client to work with a Taskserver.
-    </para>
-  </section>
+  <para>
+   While the client certificates in Taskserver only authenticate whether a user
+   is allowed to connect, every user has its own UUID which identifies it as an
+   entity.
+  </para>
 
-  <section xml:id="module-services-taskserver-nixos-taskserver-tool">
-    <title>The nixos-taskserver tool</title>
+  <para>
+   With <command>nixos-taskserver</command> the client certificate is created
+   along with the UUID of the user, so it handles all of the credentials needed
+   in order to setup the Taskwarrior client to work with a Taskserver.
+  </para>
+ </section>
+ <section xml:id="module-services-taskserver-nixos-taskserver-tool">
+  <title>The nixos-taskserver tool</title>
 
-    <para>
-      Because Taskserver by default only provides scripts to setup users
-      imperatively, the <command>nixos-taskserver</command> tool is used for
-      addition and deletion of organisations along with users and groups defined
-      by <xref linkend="opt-services.taskserver.organisations"/> and as well for
-      imperative set up.
-    </para>
+  <para>
+   Because Taskserver by default only provides scripts to setup users
+   imperatively, the <command>nixos-taskserver</command> tool is used for
+   addition and deletion of organisations along with users and groups defined
+   by <xref linkend="opt-services.taskserver.organisations"/> and as well for
+   imperative set up.
+  </para>
 
-    <para>
-      The tool is designed to not interfere if the command is used to manually
-      set up some organisations, users or groups.
-    </para>
+  <para>
+   The tool is designed to not interfere if the command is used to manually set
+   up some organisations, users or groups.
+  </para>
 
-    <para>
-      For example if you add a new organisation using
-      <command>nixos-taskserver org add foo</command>, the organisation is not
-      modified and deleted no matter what you define in
-      <option>services.taskserver.organisations</option>, even if you're adding
-      the same organisation in that option.
-    </para>
+  <para>
+   For example if you add a new organisation using <command>nixos-taskserver
+   org add foo</command>, the organisation is not modified and deleted no
+   matter what you define in
+   <option>services.taskserver.organisations</option>, even if you're adding
+   the same organisation in that option.
+  </para>
 
-    <para>
-      The tool is modelled to imitate the official <command>taskd</command>
-      command, documentation for each subcommand can be shown by using the
-      <option>--help</option> switch.
-    </para>
-  </section>
-  <section xml:id="module-services-taskserver-declarative-ca-management">
-    <title>Declarative/automatic CA management</title>
+  <para>
+   The tool is modelled to imitate the official <command>taskd</command>
+   command, documentation for each subcommand can be shown by using the
+   <option>--help</option> switch.
+  </para>
+ </section>
+ <section xml:id="module-services-taskserver-declarative-ca-management">
+  <title>Declarative/automatic CA management</title>
 
-    <para>
-      Everything is done according to what you specify in the module options,
-      however in order to set up a Taskwarrior client for synchronisation with a
-      Taskserver instance, you have to transfer the keys and certificates to the
-      client machine.
-    </para>
+  <para>
+   Everything is done according to what you specify in the module options,
+   however in order to set up a Taskwarrior client for synchronisation with a
+   Taskserver instance, you have to transfer the keys and certificates to the
+   client machine.
+  </para>
 
-    <para>
-      This is done using
-      <command>nixos-taskserver user export $orgname $username</command> which
-      is printing a shell script fragment to stdout which can either be used
-      verbatim or adjusted to import the user on the client machine.
-    </para>
+  <para>
+   This is done using <command>nixos-taskserver user export $orgname
+   $username</command> which is printing a shell script fragment to stdout
+   which can either be used verbatim or adjusted to import the user on the
+   client machine.
+  </para>
 
-    <para>
-      For example, let's say you have the following configuration:
+  <para>
+   For example, let's say you have the following configuration:
 <screen>
 {
   <xref linkend="opt-services.taskserver.enable"/> = true;
@@ -105,40 +97,39 @@
   <link linkend="opt-services.taskserver.organisations._name_.users">services.taskserver.organisations.my-company.users</link> = [ "alice" ];
 }
 </screen>
-      This creates an organisation called <literal>my-company</literal> with the
-      user <literal>alice</literal>.
-    </para>
+   This creates an organisation called <literal>my-company</literal> with the
+   user <literal>alice</literal>.
+  </para>
 
-    <para>
-      Now in order to import the <literal>alice</literal> user to another
-      machine <literal>alicebox</literal>, all we need to do is something like
-      this:
+  <para>
+   Now in order to import the <literal>alice</literal> user to another machine
+   <literal>alicebox</literal>, all we need to do is something like this:
 <screen>
 $ ssh server nixos-taskserver user export my-company alice | sh
 </screen>
-      Of course, if no SSH daemon is available on the server you can also copy
-      &amp; paste it directly into a shell.
-    </para>
+   Of course, if no SSH daemon is available on the server you can also copy
+   &amp; paste it directly into a shell.
+  </para>
 
-    <para>
-      After this step the user should be set up and you can start synchronising
-      your tasks for the first time with <command>task sync init</command> on
-      <literal>alicebox</literal>.
-    </para>
+  <para>
+   After this step the user should be set up and you can start synchronising
+   your tasks for the first time with <command>task sync init</command> on
+   <literal>alicebox</literal>.
+  </para>
 
-    <para>
-      Subsequent synchronisation requests merely require the command
-      <command>task sync</command> after that stage.
-    </para>
-  </section>
-  <section xml:id="module-services-taskserver-manual-ca-management">
-    <title>Manual CA management</title>
+  <para>
+   Subsequent synchronisation requests merely require the command <command>task
+   sync</command> after that stage.
+  </para>
+ </section>
+ <section xml:id="module-services-taskserver-manual-ca-management">
+  <title>Manual CA management</title>
 
-    <para>
-      If you set any options within
-      <link linkend="opt-services.taskserver.pki.manual.ca.cert">service.taskserver.pki.manual</link>.*,
-      <command>nixos-taskserver</command> won't issue certificates, but you can
-      still use it for adding or removing user accounts.
-    </para>
-  </section>
+  <para>
+   If you set any options within
+   <link linkend="opt-services.taskserver.pki.manual.ca.cert">service.taskserver.pki.manual</link>.*,
+   <command>nixos-taskserver</command> won't issue certificates, but you can
+   still use it for adding or removing user accounts.
+  </para>
+ </section>
 </chapter>
diff --git a/nixos/modules/services/misc/weechat.xml b/nixos/modules/services/misc/weechat.xml
index de86dede2eb5..9c9ee0448c92 100644
--- a/nixos/modules/services/misc/weechat.xml
+++ b/nixos/modules/services/misc/weechat.xml
@@ -3,22 +3,24 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="module-services-weechat">
+ <title>WeeChat</title>
+ <para>
+  <link xlink:href="https://weechat.org/">WeeChat</link> is a fast and
+  extensible IRC client.
+ </para>
+ <section>
+  <title>Basic Usage</title>
 
-<title>WeeChat</title>
-<para><link xlink:href="https://weechat.org/">WeeChat</link> is a fast and extensible IRC client.</para>
-
-<section><title>Basic Usage</title>
-<para>
-By default, the module creates a
-<literal><link xlink:href="https://www.freedesktop.org/wiki/Software/systemd/">systemd</link></literal> unit
-which runs the chat client in a detached
-<literal><link xlink:href="https://www.gnu.org/software/screen/">screen</link></literal> session.
-
-</para>
-
-<para>
-This can be done by enabling the <literal>weechat</literal> service:
+  <para>
+   By default, the module creates a
+   <literal><link xlink:href="https://www.freedesktop.org/wiki/Software/systemd/">systemd</link></literal>
+   unit which runs the chat client in a detached
+   <literal><link xlink:href="https://www.gnu.org/software/screen/">screen</link></literal>
+   session.
+  </para>
 
+  <para>
+   This can be done by enabling the <literal>weechat</literal> service:
 <programlisting>
 { ... }:
 
@@ -26,19 +28,22 @@ This can be done by enabling the <literal>weechat</literal> service:
   <link linkend="opt-services.weechat.enable">services.weechat.enable</link> = true;
 }
 </programlisting>
-</para>
-<para>
-The service is managed by a dedicated user
-named <literal>weechat</literal> in the state directory
-<literal>/var/lib/weechat</literal>.
-</para>
-</section>
-<section><title>Re-attaching to WeeChat</title>
-<para>
-WeeChat runs in a screen session owned by a dedicated user. To explicitly
-allow your another user to attach to this session, the <literal>screenrc</literal> needs to be tweaked
-by adding <link xlink:href="https://www.gnu.org/software/screen/manual/html_node/Multiuser.html#Multiuser">multiuser</link> support:
+  </para>
+
+  <para>
+   The service is managed by a dedicated user named <literal>weechat</literal>
+   in the state directory <literal>/var/lib/weechat</literal>.
+  </para>
+ </section>
+ <section>
+  <title>Re-attaching to WeeChat</title>
 
+  <para>
+   WeeChat runs in a screen session owned by a dedicated user. To explicitly
+   allow your another user to attach to this session, the
+   <literal>screenrc</literal> needs to be tweaked by adding
+   <link xlink:href="https://www.gnu.org/software/screen/manual/html_node/Multiuser.html#Multiuser">multiuser</link>
+   support:
 <programlisting>
 {
   <link linkend="opt-programs.screen.screenrc">programs.screen.screenrc</link> = ''
@@ -47,15 +52,15 @@ by adding <link xlink:href="https://www.gnu.org/software/screen/manual/html_node
   '';
 }
 </programlisting>
-
-Now, the session can be re-attached like this:
-
+   Now, the session can be re-attached like this:
 <programlisting>
 screen -r weechat-screen
 </programlisting>
-</para>
-<para>
-<emphasis>The session name can be changed using <link linkend="opt-services.weechat.sessionName">services.weechat.sessionName.</link></emphasis>
-</para>
-</section>
+  </para>
+
+  <para>
+   <emphasis>The session name can be changed using
+   <link linkend="opt-services.weechat.sessionName">services.weechat.sessionName.</link></emphasis>
+  </para>
+ </section>
 </chapter>
diff --git a/nixos/modules/services/monitoring/prometheus/alertmanager.nix b/nixos/modules/services/monitoring/prometheus/alertmanager.nix
index 8a47c9f1e7d8..8a44cf7fd8f6 100644
--- a/nixos/modules/services/monitoring/prometheus/alertmanager.nix
+++ b/nixos/modules/services/monitoring/prometheus/alertmanager.nix
@@ -9,6 +9,15 @@ let
     if cfg.configText != null then
       pkgs.writeText "alertmanager.yml" cfg.configText
     else mkConfigFile;
+  cmdlineArgs = cfg.extraFlags ++ [
+    "--config.file ${alertmanagerYml}"
+    "--web.listen-address ${cfg.listenAddress}:${toString cfg.port}"
+    "--log.level ${cfg.logLevel}"
+    ] ++ (optional (cfg.webExternalUrl != null)
+      "--web.external-url ${cfg.webExternalUrl}"
+    ) ++ (optional (cfg.logFormat != null)
+      "--log.format ${cfg.logFormat}"
+  );
 in {
   options = {
     services.prometheus.alertmanager = {
@@ -99,6 +108,14 @@ in {
           Open port in firewall for incoming connections.
         '';
       };
+
+      extraFlags = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        description = ''
+          Extra commandline options when launching the Alertmanager.
+        '';
+      };
     };
   };
 
@@ -111,11 +128,7 @@ in {
       after    = [ "network.target" ];
       script = ''
         ${pkgs.prometheus-alertmanager.bin}/bin/alertmanager \
-        --config.file ${alertmanagerYml} \
-        --web.listen-address ${cfg.listenAddress}:${toString cfg.port} \
-        --log.level ${cfg.logLevel} \
-        ${optionalString (cfg.webExternalUrl != null) ''--web.external-url ${cfg.webExternalUrl} \''}
-        ${optionalString (cfg.logFormat != null) "--log.format ${cfg.logFormat}"}
+          ${concatStringsSep " \\\n  " cmdlineArgs}
       '';
 
       serviceConfig = {
diff --git a/nixos/modules/services/monitoring/prometheus/exporters.xml b/nixos/modules/services/monitoring/prometheus/exporters.xml
index be86abb74b44..7a0a1bdf2c14 100644
--- a/nixos/modules/services/monitoring/prometheus/exporters.xml
+++ b/nixos/modules/services/monitoring/prometheus/exporters.xml
@@ -3,13 +3,19 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="module-services-prometheus-exporters">
+ <title>Prometheus exporters</title>
+ <para>
+  Prometheus exporters provide metrics for the
+  <link xlink:href="https://prometheus.io">prometheus monitoring system</link>.
+ </para>
+ <section xml:id="module-services-prometheus-exporters-configuration">
+  <title>Configuration</title>
 
-<title>Prometheus exporters</title>
-
-<para>Prometheus exporters provide metrics for the <link xlink:href="https://prometheus.io">prometheus monitoring system</link>.</para>
-
-<section xml:id="module-services-prometheus-exporters-configuration"><title>Configuration</title>
-  <para>One of the most common exporters is the <link xlink:href="https://github.com/prometheus/node_exporter">node exporter</link>, it provides hardware and OS metrics from the host it's running on. The exporter could be configured as follows:
+  <para>
+   One of the most common exporters is the
+   <link xlink:href="https://github.com/prometheus/node_exporter">node
+   exporter</link>, it provides hardware and OS metrics from the host it's
+   running on. The exporter could be configured as follows:
 <programlisting>
   services.promtheus.exporters.node = {
     enable = true;
@@ -24,43 +30,88 @@
     firewallFilter = "-i br0 -p tcp -m tcp --dport 9100";
   };
 </programlisting>
-It should now serve all metrics from the collectors
-that are explicitly enabled and the ones that are
-<link xlink:href="https://github.com/prometheus/node_exporter#enabled-by-default">enabled by default</link>, via http under <literal>/metrics</literal>. In this example the firewall should just
-allow incoming connections to the exporter's port on the bridge interface <literal>br0</literal>
-(this would have to be configured seperately of course).
-For more information about configuration see <literal>man configuration.nix</literal> or
-search through the <link xlink:href="https://nixos.org/nixos/options.html#prometheus.exporters">available options</link>.
-</para>
-</section>
-<section xml:id="module-services-prometheus-exporters-new-exporter"><title>Adding a new exporter</title>
-  <para>To add a new exporter, it has to be packaged first (see <literal>nixpkgs/pkgs/servers/monitoring/prometheus/</literal> for examples), then a module can be added. The postfix exporter is used in this example:</para>
-<itemizedlist>
-  <listitem>
+   It should now serve all metrics from the collectors that are explicitly
+   enabled and the ones that are
+   <link xlink:href="https://github.com/prometheus/node_exporter#enabled-by-default">enabled
+   by default</link>, via http under <literal>/metrics</literal>. In this
+   example the firewall should just allow incoming connections to the
+   exporter's port on the bridge interface <literal>br0</literal> (this would
+   have to be configured seperately of course). For more information about
+   configuration see <literal>man configuration.nix</literal> or search through
+   the
+   <link xlink:href="https://nixos.org/nixos/options.html#prometheus.exporters">available
+   options</link>.
+  </para>
+ </section>
+ <section xml:id="module-services-prometheus-exporters-new-exporter">
+  <title>Adding a new exporter</title>
+
+  <para>
+   To add a new exporter, it has to be packaged first (see
+   <literal>nixpkgs/pkgs/servers/monitoring/prometheus/</literal> for
+   examples), then a module can be added. The postfix exporter is used in this
+   example:
+  </para>
+
+  <itemizedlist>
+   <listitem>
     <para>
-      Some default options for all exporters are provided by
-      <literal>nixpkgs/nixos/modules/services/monitoring/prometheus/exporters.nix</literal>:
+     Some default options for all exporters are provided by
+     <literal>nixpkgs/nixos/modules/services/monitoring/prometheus/exporters.nix</literal>:
     </para>
-  </listitem>
-  <listitem override='none'>
+   </listitem>
+   <listitem override='none'>
     <itemizedlist>
-      <listitem><para><literal>enable</literal></para></listitem>
-      <listitem><para><literal>port</literal></para></listitem>
-      <listitem><para><literal>listenAddress</literal></para></listitem>
-      <listitem><para><literal>extraFlags</literal></para></listitem>
-      <listitem><para><literal>openFirewall</literal></para></listitem>
-      <listitem><para><literal>firewallFilter</literal></para></listitem>
-      <listitem><para><literal>user</literal></para></listitem>
-      <listitem><para><literal>group</literal></para></listitem>
+     <listitem>
+      <para>
+       <literal>enable</literal>
+      </para>
+     </listitem>
+     <listitem>
+      <para>
+       <literal>port</literal>
+      </para>
+     </listitem>
+     <listitem>
+      <para>
+       <literal>listenAddress</literal>
+      </para>
+     </listitem>
+     <listitem>
+      <para>
+       <literal>extraFlags</literal>
+      </para>
+     </listitem>
+     <listitem>
+      <para>
+       <literal>openFirewall</literal>
+      </para>
+     </listitem>
+     <listitem>
+      <para>
+       <literal>firewallFilter</literal>
+      </para>
+     </listitem>
+     <listitem>
+      <para>
+       <literal>user</literal>
+      </para>
+     </listitem>
+     <listitem>
+      <para>
+       <literal>group</literal>
+      </para>
+     </listitem>
     </itemizedlist>
-  </listitem>
-  <listitem>
-    <para>As there is already a package available, the module can now be added.
-      This is accomplished by adding a new file to the
-      <literal>nixos/modules/services/monitoring/prometheus/exporters/</literal> directory,
-      which will be called postfix.nix and contains all exporter specific options
-      and configuration:
-      <programlisting>
+   </listitem>
+   <listitem>
+    <para>
+     As there is already a package available, the module can now be added. This
+     is accomplished by adding a new file to the
+     <literal>nixos/modules/services/monitoring/prometheus/exporters/</literal>
+     directory, which will be called postfix.nix and contains all exporter
+     specific options and configuration:
+<programlisting>
         # nixpgs/nixos/modules/services/prometheus/exporters/postfix.nix
         { config, lib, pkgs }:
 
@@ -121,15 +172,16 @@ search through the <link xlink:href="https://nixos.org/nixos/options.html#promet
         }
       </programlisting>
     </para>
-  </listitem>
-  <listitem>
+   </listitem>
+   <listitem>
     <para>
-      This should already be enough for the postfix exporter. Additionally one could
-      now add assertions and conditional default values. This can be done in the
-      'meta-module' that combines all exporter definitions and generates the submodules:
-      <literal>nixpkgs/nixos/modules/services/prometheus/exporters.nix</literal>
+     This should already be enough for the postfix exporter. Additionally one
+     could now add assertions and conditional default values. This can be done
+     in the 'meta-module' that combines all exporter definitions and generates
+     the submodules:
+     <literal>nixpkgs/nixos/modules/services/prometheus/exporters.nix</literal>
     </para>
-  </listitem>
-</itemizedlist>
-</section>
+   </listitem>
+  </itemizedlist>
+ </section>
 </chapter>
diff --git a/nixos/modules/services/monitoring/prometheus/exporters/snmp.nix b/nixos/modules/services/monitoring/prometheus/exporters/snmp.nix
index 404cd0a1896b..0d9194124325 100644
--- a/nixos/modules/services/monitoring/prometheus/exporters/snmp.nix
+++ b/nixos/modules/services/monitoring/prometheus/exporters/snmp.nix
@@ -60,10 +60,10 @@ in
       DynamicUser = true;
       ExecStart = ''
         ${pkgs.prometheus-snmp-exporter.bin}/bin/snmp_exporter \
-          -config.file ${configFile} \
-          -log.format ${cfg.logFormat} \
-          -log.level ${cfg.logLevel} \
-          -web.listen-address ${cfg.listenAddress}:${toString cfg.port} \
+          --config.file=${configFile} \
+          --log.format=${cfg.logFormat} \
+          --log.level=${cfg.logLevel} \
+          --web.listen-address=${cfg.listenAddress}:${toString cfg.port} \
           ${concatStringsSep " \\\n  " cfg.extraFlags}
       '';
     };
diff --git a/nixos/modules/services/networking/bitlbee.nix b/nixos/modules/services/networking/bitlbee.nix
index 392a8d5c2e7c..46e3b7457610 100644
--- a/nixos/modules/services/networking/bitlbee.nix
+++ b/nixos/modules/services/networking/bitlbee.nix
@@ -7,9 +7,10 @@ let
   cfg = config.services.bitlbee;
   bitlbeeUid = config.ids.uids.bitlbee;
 
-  bitlbeePkg = if cfg.libpurple_plugins == []
-  then pkgs.bitlbee
-  else pkgs.bitlbee.override { enableLibPurple = true; };
+  bitlbeePkg = pkgs.bitlbee.override {
+    enableLibPurple = cfg.libpurple_plugins != [];
+    enablePam = cfg.authBackend == "pam";
+  };
 
   bitlbeeConfig = pkgs.writeText "bitlbee.conf"
     ''
@@ -20,6 +21,7 @@ let
     DaemonInterface = ${cfg.interface}
     DaemonPort = ${toString cfg.portNumber}
     AuthMode = ${cfg.authMode}
+    AuthBackend = ${cfg.authBackend}
     Plugindir = ${pkgs.bitlbee-plugins cfg.plugins}/lib/bitlbee
     ${lib.optionalString (cfg.hostName != "") "HostName = ${cfg.hostName}"}
     ${lib.optionalString (cfg.protocols != "") "Protocols = ${cfg.protocols}"}
@@ -70,6 +72,16 @@ in
         '';
       };
 
+      authBackend = mkOption {
+        default = "storage";
+        type = types.enum [ "storage" "pam" ];
+        description = ''
+          How users are authenticated
+            storage -- save passwords internally
+            pam -- Linux PAM authentication
+        '';
+      };
+
       authMode = mkOption {
         default = "Open";
         type = types.enum [ "Open" "Closed" "Registered" ];
@@ -147,23 +159,22 @@ in
 
   ###### implementation
 
-  config = mkIf config.services.bitlbee.enable {
-
-    users.users = singleton
-      { name = "bitlbee";
+  config =  mkMerge [
+    (mkIf config.services.bitlbee.enable {
+      users.users = singleton {
+        name = "bitlbee";
         uid = bitlbeeUid;
         description = "BitlBee user";
         home = "/var/lib/bitlbee";
         createHome = true;
       };
 
-    users.groups = singleton
-      { name = "bitlbee";
+      users.groups = singleton {
+        name = "bitlbee";
         gid = config.ids.gids.bitlbee;
       };
 
-    systemd.services.bitlbee =
-      {
+      systemd.services.bitlbee = {
         environment.PURPLE_PLUGIN_PATH = purple_plugin_path;
         description = "BitlBee IRC to other chat networks gateway";
         after = [ "network.target" ];
@@ -172,8 +183,12 @@ in
         serviceConfig.ExecStart = "${bitlbeePkg}/sbin/bitlbee -F -n -c ${bitlbeeConfig}";
       };
 
-    environment.systemPackages = [ bitlbeePkg ];
+      environment.systemPackages = [ bitlbeePkg ];
 
-  };
+    })
+    (mkIf (config.services.bitlbee.authBackend == "pam") {
+      security.pam.services.bitlbee = {};
+    })
+  ];
 
 }
diff --git a/nixos/modules/services/networking/charybdis.nix b/nixos/modules/services/networking/charybdis.nix
index 6d57faa9ac2b..3d02dc8d1375 100644
--- a/nixos/modules/services/networking/charybdis.nix
+++ b/nixos/modules/services/networking/charybdis.nix
@@ -90,7 +90,7 @@ in
           BANDB_DBPATH = "${cfg.statedir}/ban.db";
         };
         serviceConfig = {
-          ExecStart   = "${charybdis}/bin/charybdis-ircd -foreground -logfile /dev/stdout -configfile ${configFile}";
+          ExecStart   = "${charybdis}/bin/charybdis -foreground -logfile /dev/stdout -configfile ${configFile}";
           Group = cfg.group;
           User = cfg.user;
           PermissionsStartOnly = true; # preStart needs to run with root permissions
diff --git a/nixos/modules/services/networking/dnscrypt-proxy.xml b/nixos/modules/services/networking/dnscrypt-proxy.xml
index a97579202523..f90eef69848c 100644
--- a/nixos/modules/services/networking/dnscrypt-proxy.xml
+++ b/nixos/modules/services/networking/dnscrypt-proxy.xml
@@ -3,67 +3,64 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="sec-dnscrypt-proxy">
-
-  <title>DNSCrypt client proxy</title>
+ <title>DNSCrypt client proxy</title>
+ <para>
+  The DNSCrypt client proxy relays DNS queries to a DNSCrypt enabled upstream
+  resolver. The traffic between the client and the upstream resolver is
+  encrypted and authenticated, mitigating the risk of MITM attacks, DNS
+  poisoning attacks, and third-party snooping (assuming the upstream is
+  trustworthy).
+ </para>
+ <sect1 xml:id="sec-dnscrypt-proxy-configuration">
+  <title>Basic configuration</title>
 
   <para>
-    The DNSCrypt client proxy relays DNS queries to a DNSCrypt enabled
-    upstream resolver. The traffic between the client and the upstream
-    resolver is encrypted and authenticated, mitigating the risk of MITM
-    attacks, DNS poisoning attacks, and third-party snooping (assuming the
-    upstream is trustworthy).
-  </para>
-
-  <sect1 xml:id="sec-dnscrypt-proxy-configuration"><title>Basic configuration</title>
-
-  <para>
-    To enable the client proxy, set
-    <programlisting>
+   To enable the client proxy, set
+<programlisting>
 <xref linkend="opt-services.dnscrypt-proxy.enable"/> = true;
     </programlisting>
   </para>
 
   <para>
-    Enabling the client proxy does not alter the system nameserver; to
-    relay local queries, prepend <literal>127.0.0.1</literal> to
-    <option>networking.nameservers</option>.
+   Enabling the client proxy does not alter the system nameserver; to relay
+   local queries, prepend <literal>127.0.0.1</literal> to
+   <option>networking.nameservers</option>.
   </para>
-
-  </sect1>
-
-  <sect1 xml:id="sec-dnscrypt-proxy-forwarder"><title>As a forwarder for another DNS client</title>
+ </sect1>
+ <sect1 xml:id="sec-dnscrypt-proxy-forwarder">
+  <title>As a forwarder for another DNS client</title>
 
   <para>
-    To run the DNSCrypt proxy client as a forwarder for another
-    DNS client, change the default proxy listening port to a
-    non-standard value and point the other client to it:
-    <programlisting>
+   To run the DNSCrypt proxy client as a forwarder for another DNS client,
+   change the default proxy listening port to a non-standard value and point
+   the other client to it:
+<programlisting>
 <xref linkend="opt-services.dnscrypt-proxy.localPort"/> = 43;
     </programlisting>
   </para>
 
-  <sect2 xml:id="sec-dnscrypt-proxy-forwarder-dsnmasq"><title>dnsmasq</title>
-  <para>
-    <programlisting>
+  <sect2 xml:id="sec-dnscrypt-proxy-forwarder-dsnmasq">
+   <title>dnsmasq</title>
+   <para>
+<programlisting>
 {
   <xref linkend="opt-services.dnsmasq.enable"/> = true;
   <xref linkend="opt-services.dnsmasq.servers"/> = [ "127.0.0.1#43" ];
 }
     </programlisting>
-  </para>
+   </para>
   </sect2>
 
-  <sect2 xml:id="sec-dnscrypt-proxy-forwarder-unbound"><title>unbound</title>
-  <para>
-    <programlisting>
+  <sect2 xml:id="sec-dnscrypt-proxy-forwarder-unbound">
+   <title>unbound</title>
+   <para>
+<programlisting>
 {
   <xref linkend="opt-services.unbound.enable"/> = true;
   <xref linkend="opt-services.unbound.forwardAddresses"/> = [ "127.0.0.1@43" ];
 }
     </programlisting>
-  </para>
+   </para>
   </sect2>
-
-  </sect1>
-
+ </sect1>
 </chapter>
diff --git a/nixos/modules/services/networking/miniupnpd.nix b/nixos/modules/services/networking/miniupnpd.nix
index 19400edb68f9..ab714a6ac75e 100644
--- a/nixos/modules/services/networking/miniupnpd.nix
+++ b/nixos/modules/services/networking/miniupnpd.nix
@@ -57,32 +57,12 @@ in
   };
 
   config = mkIf cfg.enable {
-    # from miniupnpd/netfilter/iptables_init.sh
     networking.firewall.extraCommands = ''
-      iptables -t nat -N MINIUPNPD
-      iptables -t nat -A PREROUTING -i ${cfg.externalInterface} -j MINIUPNPD
-      iptables -t mangle -N MINIUPNPD
-      iptables -t mangle -A PREROUTING -i ${cfg.externalInterface} -j MINIUPNPD
-      iptables -t filter -N MINIUPNPD
-      iptables -t filter -A FORWARD -i ${cfg.externalInterface} ! -o ${cfg.externalInterface} -j MINIUPNPD
-      iptables -t nat -N MINIUPNPD-PCP-PEER
-      iptables -t nat -A POSTROUTING -o ${cfg.externalInterface} -j MINIUPNPD-PCP-PEER
+      ${pkgs.bash}/bin/bash -x ${pkgs.miniupnpd}/etc/miniupnpd/iptables_init.sh -i ${cfg.externalInterface}
     '';
 
-    # from miniupnpd/netfilter/iptables_removeall.sh
     networking.firewall.extraStopCommands = ''
-      iptables -t nat -F MINIUPNPD
-      iptables -t nat -D PREROUTING -i ${cfg.externalInterface} -j MINIUPNPD
-      iptables -t nat -X MINIUPNPD
-      iptables -t mangle -F MINIUPNPD
-      iptables -t mangle -D PREROUTING -i ${cfg.externalInterface} -j MINIUPNPD
-      iptables -t mangle -X MINIUPNPD
-      iptables -t filter -F MINIUPNPD
-      iptables -t filter -D FORWARD -i ${cfg.externalInterface} ! -o ${cfg.externalInterface} -j MINIUPNPD
-      iptables -t filter -X MINIUPNPD
-      iptables -t nat -F MINIUPNPD-PCP-PEER
-      iptables -t nat -D POSTROUTING -o ${cfg.externalInterface} -j MINIUPNPD-PCP-PEER
-      iptables -t nat -X MINIUPNPD-PCP-PEER
+      ${pkgs.bash}/bin/bash -x ${pkgs.miniupnpd}/etc/miniupnpd/iptables_removeall.sh -i ${cfg.externalInterface}
     '';
 
     systemd.services.miniupnpd = {
diff --git a/nixos/modules/services/networking/murmur.nix b/nixos/modules/services/networking/murmur.nix
index fcc813e6898f..a6e90feff7ea 100644
--- a/nixos/modules/services/networking/murmur.nix
+++ b/nixos/modules/services/networking/murmur.nix
@@ -50,7 +50,7 @@ in
       enable = mkOption {
         type = types.bool;
         default = false;
-        description = "If enabled, start the Murmur Service.";
+        description = "If enabled, start the Murmur Mumble server.";
       };
 
       autobanAttempts = mkOption {
diff --git a/nixos/modules/services/networking/shairport-sync.nix b/nixos/modules/services/networking/shairport-sync.nix
index 0b87140b0d8d..36ecb74ffc95 100644
--- a/nixos/modules/services/networking/shairport-sync.nix
+++ b/nixos/modules/services/networking/shairport-sync.nix
@@ -27,7 +27,7 @@ in
       };
 
       arguments = mkOption {
-        default = "-v -o pulse";
+        default = "-v -d pulse";
         description = ''
           Arguments to pass to the daemon. Defaults to a local pulseaudio
           server.
@@ -72,6 +72,7 @@ in
         serviceConfig = {
           User = cfg.user;
           ExecStart = "${pkgs.shairport-sync}/bin/shairport-sync ${cfg.arguments}";
+          RuntimeDirectory = "shairport-sync";
         };
       };
 
diff --git a/nixos/modules/services/security/clamav.nix b/nixos/modules/services/security/clamav.nix
index 9ad0095252de..04b433f8f2bf 100644
--- a/nixos/modules/services/security/clamav.nix
+++ b/nixos/modules/services/security/clamav.nix
@@ -95,7 +95,7 @@ in
     environment.etc."clamav/freshclam.conf".source = freshclamConfigFile;
     environment.etc."clamav/clamd.conf".source = clamdConfigFile;
 
-    systemd.services.clamav-daemon = optionalAttrs cfg.daemon.enable {
+    systemd.services.clamav-daemon = mkIf cfg.daemon.enable {
       description = "ClamAV daemon (clamd)";
       after = optional cfg.updater.enable "clamav-freshclam.service";
       requires = optional cfg.updater.enable "clamav-freshclam.service";
@@ -116,7 +116,7 @@ in
       };
     };
 
-    systemd.timers.clamav-freshclam = optionalAttrs cfg.updater.enable {
+    systemd.timers.clamav-freshclam = mkIf cfg.updater.enable {
       description = "Timer for ClamAV virus database updater (freshclam)";
       wantedBy = [ "timers.target" ];
       timerConfig = {
@@ -125,7 +125,7 @@ in
       };
     };
 
-    systemd.services.clamav-freshclam = optionalAttrs cfg.updater.enable {
+    systemd.services.clamav-freshclam = mkIf cfg.updater.enable {
       description = "ClamAV virus database updater (freshclam)";
       restartTriggers = [ freshclamConfigFile ];
 
@@ -137,6 +137,7 @@ in
       serviceConfig = {
         Type = "oneshot";
         ExecStart = "${pkg}/bin/freshclam";
+        SuccessExitStatus = "1"; # if databases are up to date
         PrivateTmp = "yes";
         PrivateDevices = "yes";
       };
diff --git a/nixos/modules/services/web-apps/matomo-doc.xml b/nixos/modules/services/web-apps/matomo-doc.xml
index 6f878015c514..510a335edc3b 100644
--- a/nixos/modules/services/web-apps/matomo-doc.xml
+++ b/nixos/modules/services/web-apps/matomo-doc.xml
@@ -3,28 +3,24 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="module-services-matomo">
+ <title>Matomo</title>
+ <para>
+  Matomo is a real-time web analytics application. This module configures
+  php-fpm as backend for Matomo, optionally configuring an nginx vhost as well.
+ </para>
+ <para>
+  An automatic setup is not suported by Matomo, so you need to configure Matomo
+  itself in the browser-based Matomo setup.
+ </para>
+ <section xml:id="module-services-matomo-database-setup">
+  <title>Database Setup</title>
 
-  <title>Matomo</title>
   <para>
-    Matomo is a real-time web analytics application.
-    This module configures php-fpm as backend for Matomo, optionally configuring an nginx vhost as well.
-  </para>
-
-  <para>
-    An automatic setup is not suported by Matomo, so you need to configure Matomo itself in the browser-based Matomo setup.
-  </para>
-
-
-  <section xml:id="module-services-matomo-database-setup">
-    <title>Database Setup</title>
-
-    <para>
-      You also need to configure a MariaDB or MySQL database and -user for Matomo yourself,
-      and enter those credentials in your browser.
-      You can use passwordless database authentication via the UNIX_SOCKET authentication plugin
-      with the following SQL commands:
-
-      <programlisting>
+   You also need to configure a MariaDB or MySQL database and -user for Matomo
+   yourself, and enter those credentials in your browser. You can use
+   passwordless database authentication via the UNIX_SOCKET authentication
+   plugin with the following SQL commands:
+<programlisting>
         # For MariaDB
         INSTALL PLUGIN unix_socket SONAME 'auth_socket';
         CREATE DATABASE matomo;
@@ -37,59 +33,58 @@
         CREATE USER 'matomo'@'localhost' IDENTIFIED WITH auth_socket;
         GRANT ALL PRIVILEGES ON matomo.* TO 'matomo'@'localhost';
       </programlisting>
+   Then fill in <literal>matomo</literal> as database user and database name,
+   and leave the password field blank. This authentication works by allowing
+   only the <literal>matomo</literal> unix user to authenticate as the
+   <literal>matomo</literal> database user (without needing a password), but no
+   other users. For more information on passwordless login, see
+   <link xlink:href="https://mariadb.com/kb/en/mariadb/unix_socket-authentication-plugin/" />.
+  </para>
 
-      Then fill in <literal>matomo</literal> as database user and database name, and leave the password field blank.
-      This authentication works by allowing only the <literal>matomo</literal> unix user to authenticate as the
-      <literal>matomo</literal> database user (without needing a password), but no other users.
-      For more information on passwordless login, see
-      <link xlink:href="https://mariadb.com/kb/en/mariadb/unix_socket-authentication-plugin/" />.
-    </para>
-
-    <para>
-      Of course, you can use password based authentication as well, e.g. when the database is not on the same host.
-    </para>
-  </section>
+  <para>
+   Of course, you can use password based authentication as well, e.g. when the
+   database is not on the same host.
+  </para>
+ </section>
+ <section xml:id="module-services-matomo-backups">
+  <title>Backup</title>
 
+  <para>
+   You only need to take backups of your MySQL database and the
+   <filename>/var/lib/matomo/config/config.ini.php</filename> file. Use a user
+   in the <literal>matomo</literal> group or root to access the file. For more
+   information, see
+   <link xlink:href="https://matomo.org/faq/how-to-install/faq_138/" />.
+  </para>
+ </section>
+ <section xml:id="module-services-matomo-issues">
+  <title>Issues</title>
 
-  <section xml:id="module-services-matomo-backups">
-    <title>Backup</title>
+  <itemizedlist>
+   <listitem>
     <para>
-      You only need to take backups of your MySQL database and the
-      <filename>/var/lib/matomo/config/config.ini.php</filename> file.
-      Use a user in the <literal>matomo</literal> group or root to access the file.
-      For more information, see <link xlink:href="https://matomo.org/faq/how-to-install/faq_138/" />.
+     Matomo's file integrity check will warn you. This is due to the patches
+     necessary for NixOS, you can safely ignore this.
     </para>
-  </section>
-
-
-  <section xml:id="module-services-matomo-issues">
-    <title>Issues</title>
-    <itemizedlist>
-      <listitem>
-        <para>
-          Matomo's file integrity check will warn you.
-          This is due to the patches necessary for NixOS, you can safely ignore this.
-        </para>
-      </listitem>
-
-      <listitem>
-        <para>
-          Matomo will warn you that the JavaScript tracker is not writable.
-          This is because it's located in the read-only nix store.
-          You can safely ignore this, unless you need a plugin that needs JavaScript tracker access.
-        </para>
-      </listitem>
-    </itemizedlist>
-  </section>
-
-
-  <section xml:id="module-services-matomo-other-web-servers">
-    <title>Using other Web Servers than nginx</title>
-
+   </listitem>
+   <listitem>
     <para>
-      You can use other web servers by forwarding calls for <filename>index.php</filename> and
-      <filename>piwik.php</filename> to the <literal>/run/phpfpm-matomo.sock</literal> fastcgi unix socket.
-      You can use the nginx configuration in the module code as a reference to what else should be configured.
+     Matomo will warn you that the JavaScript tracker is not writable. This is
+     because it's located in the read-only nix store. You can safely ignore
+     this, unless you need a plugin that needs JavaScript tracker access.
     </para>
-  </section>
+   </listitem>
+  </itemizedlist>
+ </section>
+ <section xml:id="module-services-matomo-other-web-servers">
+  <title>Using other Web Servers than nginx</title>
+
+  <para>
+   You can use other web servers by forwarding calls for
+   <filename>index.php</filename> and <filename>piwik.php</filename> to the
+   <literal>/run/phpfpm-matomo.sock</literal> fastcgi unix socket. You can use
+   the nginx configuration in the module code as a reference to what else
+   should be configured.
+  </para>
+ </section>
 </chapter>
diff --git a/nixos/modules/services/web-apps/nextcloud.nix b/nixos/modules/services/web-apps/nextcloud.nix
new file mode 100644
index 000000000000..44c3df1d057b
--- /dev/null
+++ b/nixos/modules/services/web-apps/nextcloud.nix
@@ -0,0 +1,463 @@
+{ config, lib, pkgs, ... }@args:
+
+with lib;
+
+let
+  cfg = config.services.nextcloud;
+
+  toKeyValue = generators.toKeyValue {
+    mkKeyValue = generators.mkKeyValueDefault {} " = ";
+  };
+
+  phpOptionsExtensions = ''
+    ${optionalString cfg.caching.apcu "extension=${cfg.phpPackages.apcu}/lib/php/extensions/apcu.so"}
+    ${optionalString cfg.caching.redis "extension=${cfg.phpPackages.redis}/lib/php/extensions/redis.so"}
+    ${optionalString cfg.caching.memcached "extension=${cfg.phpPackages.memcached}/lib/php/extensions/memcached.so"}
+    zend_extension = opcache.so
+    opcache.enable = 1
+  '';
+  phpOptions = {
+    upload_max_filesize = cfg.maxUploadSize;
+    post_max_size = cfg.maxUploadSize;
+    memory_limit = cfg.maxUploadSize;
+  } // cfg.phpOptions;
+  phpOptionsStr = phpOptionsExtensions + (toKeyValue phpOptions);
+
+  occ = pkgs.writeScriptBin "nextcloud-occ" ''
+    #! ${pkgs.stdenv.shell}
+    cd ${pkgs.nextcloud}
+    exec /run/wrappers/bin/sudo -u nextcloud \
+      NEXTCLOUD_CONFIG_DIR="${cfg.home}/config" \
+      ${config.services.phpfpm.phpPackage}/bin/php \
+      -c ${pkgs.writeText "php.ini" phpOptionsStr}\
+      occ $*
+  '';
+
+in {
+  options.services.nextcloud = {
+    enable = mkEnableOption "nextcloud";
+    hostName = mkOption {
+      type = types.str;
+      description = "FQDN for the nextcloud instance.";
+    };
+    home = mkOption {
+      type = types.str;
+      default = "/var/lib/nextcloud";
+      description = "Storage path of nextcloud.";
+    };
+    https = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Enable if there is a TLS terminating proxy in front of nextcloud.";
+    };
+
+    maxUploadSize = mkOption {
+      default = "512M";
+      type = types.str;
+      description = ''
+        Defines the upload limit for files. This changes the relevant options
+        in php.ini and nginx if enabled.
+      '';
+    };
+
+    skeletonDirectory = mkOption {
+      default = "";
+      type = types.str;
+      description = ''
+        The directory where the skeleton files are located. These files will be
+        copied to the data directory of new users. Leave empty to not copy any
+        skeleton files.
+      '';
+    };
+
+    nginx.enable = mkEnableOption "nginx vhost management";
+
+    webfinger = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Enable this option if you plan on using the webfinger plugin.
+        The appropriate nginx rewrite rules will be added to your configuration.
+      '';
+    };
+
+    phpPackages = mkOption {
+      type = types.attrs;
+      default = pkgs.php71Packages;
+      defaultText = "pkgs.php71Packages";
+      description = ''
+        Overridable attribute of the PHP packages set to use.  If any caching
+        module is enabled, it will be taken from here.  Therefore it should
+        match the version of PHP given to
+        <literal>services.phpfpm.phpPackage</literal>.
+      '';
+    };
+
+    phpOptions = mkOption {
+      type = types.attrsOf types.str;
+      default = {
+        "short_open_tag" = "Off";
+        "expose_php" = "Off";
+        "error_reporting" = "E_ALL & ~E_DEPRECATED & ~E_STRICT";
+        "display_errors" = "stderr";
+        "opcache.enable_cli" = "1";
+        "opcache.interned_strings_buffer" = "8";
+        "opcache.max_accelerated_files" = "10000";
+        "opcache.memory_consumption" = "128";
+        "opcache.revalidate_freq" = "1";
+        "opcache.fast_shutdown" = "1";
+        "openssl.cafile" = "/etc/ssl/certs/ca-certificates.crt";
+        "catch_workers_output" = "yes";
+      };
+      description = ''
+        Options for PHP's php.ini file for nextcloud.
+      '';
+    };
+
+    config = {
+      dbtype = mkOption {
+        type = types.enum [ "sqlite" "pgsql" "mysql" ];
+        default = "sqlite";
+        description = "Database type.";
+      };
+      dbname = mkOption {
+        type = types.nullOr types.str;
+        default = "nextcloud";
+        description = "Database name.";
+      };
+      dbuser = mkOption {
+        type = types.nullOr types.str;
+        default = "nextcloud";
+        description = "Database user.";
+      };
+      dbpass = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        description = ''
+          Database password.  Use <literal>dbpassFile</literal> to avoid this
+          being world-readable in the <literal>/nix/store</literal>.
+        '';
+      };
+      dbpassFile = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        description = ''
+          The full path to a file that contains the database password.
+        '';
+      };
+      dbhost = mkOption {
+        type = types.nullOr types.str;
+        default = "localhost";
+        description = "Database host.";
+      };
+      dbport = mkOption {
+        type = with types; nullOr (either int str);
+        default = null;
+        description = "Database port.";
+      };
+      dbtableprefix = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        description = "Table prefix in Nextcloud database.";
+      };
+      adminuser = mkOption {
+        type = types.str;
+        default = "root";
+        description = "Admin username.";
+      };
+      adminpass = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        description = ''
+          Database password.  Use <literal>adminpassFile</literal> to avoid this
+          being world-readable in the <literal>/nix/store</literal>.
+        '';
+      };
+      adminpassFile = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        description = ''
+          The full path to a file that contains the admin's password.
+        '';
+      };
+
+      extraTrustedDomains = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        description = ''
+          Trusted domains, from which the nextcloud installation will be
+          acessible.  You don't need to add
+          <literal>services.nextcloud.hostname</literal> here.
+        '';
+      };
+    };
+
+    caching = {
+      apcu = mkOption {
+        type = types.bool;
+        default = true;
+        description = ''
+          Whether to load the APCu module into PHP.
+        '';
+      };
+      redis = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to load the Redis module into PHP.
+          You still need to enable Redis in your config.php.
+          See https://docs.nextcloud.com/server/14/admin_manual/configuration_server/caching_configuration.html
+        '';
+      };
+      memcached = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to load the Memcached module into PHP.
+          You still need to enable Memcached in your config.php.
+          See https://docs.nextcloud.com/server/14/admin_manual/configuration_server/caching_configuration.html
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable (mkMerge [
+    { assertions = let acfg = cfg.config; in [
+        { assertion = !(acfg.dbpass != null && acfg.dbpassFile != null);
+          message = "Please specify no more than one of dbpass or dbpassFile";
+        }
+        { assertion = ((acfg.adminpass != null || acfg.adminpassFile != null)
+            && !(acfg.adminpass != null && acfg.adminpassFile != null));
+          message = "Please specify exactly one of adminpass or adminpassFile";
+        }
+      ];
+    }
+
+    { systemd.timers."nextcloud-cron" = {
+        wantedBy = [ "timers.target" ];
+        timerConfig.OnBootSec = "5m";
+        timerConfig.OnUnitActiveSec = "15m";
+        timerConfig.Unit = "nextcloud-cron.service";
+      };
+
+      systemd.services = {
+        "nextcloud-setup" = let
+          overrideConfig = pkgs.writeText "nextcloud-config.php" ''
+            <?php
+            $CONFIG = [
+              'apps_paths' => [
+                [ 'path' => '${cfg.home}/apps', 'url' => '/apps', 'writable' => false ],
+                [ 'path' => '${cfg.home}/store-apps', 'url' => '/store-apps', 'writable' => true ],
+              ],
+              'datadirectory' => '${cfg.home}/data',
+              'skeletondirectory' => '${cfg.skeletonDirectory}',
+              ${optionalString cfg.caching.apcu "'memcache.local' => '\\OC\\Memcache\\APCu',"}
+              'log_type' => 'syslog',
+            ];
+          '';
+          occInstallCmd = let
+            c = cfg.config;
+            adminpass = if c.adminpassFile != null
+              then ''"$(<"${toString c.adminpassFile}")"''
+              else ''"${toString c.adminpass}"'';
+            dbpass = if c.dbpassFile != null
+              then ''"$(<"${toString c.dbpassFile}")"''
+              else if c.dbpass != null
+              then ''"${toString c.dbpass}"''
+              else null;
+            installFlags = concatStringsSep " \\\n    "
+              (mapAttrsToList (k: v: "${k} ${toString v}") {
+              "--database" = ''"${c.dbtype}"'';
+              # The following attributes are optional depending on the type of
+              # database.  Those that evaluate to null on the left hand side
+              # will be omitted.
+              ${if c.dbname != null then "--database-name" else null} = ''"${c.dbname}"'';
+              ${if c.dbhost != null then "--database-host" else null} = ''"${c.dbhost}"'';
+              ${if c.dbport != null then "--database-port" else null} = ''"${toString c.dbport}"'';
+              ${if c.dbuser != null then "--database-user" else null} = ''"${c.dbuser}"'';
+              ${if (any (x: x != null) [c.dbpass c.dbpassFile])
+                 then "--database-pass" else null} = dbpass;
+              ${if c.dbtableprefix != null
+                then "--database-table-prefix" else null} = ''"${toString c.dbtableprefix}"'';
+              "--admin-user" = ''"${c.adminuser}"'';
+              "--admin-pass" = adminpass;
+              "--data-dir" = ''"${cfg.home}/data"'';
+            });
+          in ''
+            ${occ}/bin/nextcloud-occ maintenance:install \
+                ${installFlags}
+          '';
+          occSetTrustedDomainsCmd = concatStringsSep "\n" (imap0
+            (i: v: ''
+              ${occ}/bin/nextcloud-occ config:system:set trusted_domains \
+                ${toString i} --value="${toString v}"
+            '') ([ cfg.hostName ] ++ cfg.config.extraTrustedDomains));
+
+        in {
+          wantedBy = [ "multi-user.target" ];
+          before = [ "phpfpm-nextcloud.service" ];
+          script = ''
+            chmod og+x ${cfg.home}
+            ln -sf ${pkgs.nextcloud}/apps ${cfg.home}/
+            mkdir -p ${cfg.home}/config ${cfg.home}/data ${cfg.home}/store-apps
+            ln -sf ${overrideConfig} ${cfg.home}/config/override.config.php
+
+            chown -R nextcloud:nginx ${cfg.home}/config ${cfg.home}/data ${cfg.home}/store-apps
+
+            # Do not install if already installed
+            if [[ ! -e ${cfg.home}/config/config.php ]]; then
+              ${occInstallCmd}
+            fi
+
+            ${occ}/bin/nextcloud-occ upgrade
+
+            ${occ}/bin/nextcloud-occ config:system:delete trusted_domains
+            ${occSetTrustedDomainsCmd}
+          '';
+          serviceConfig.Type = "oneshot";
+        };
+        "nextcloud-cron" = {
+          environment.NEXTCLOUD_CONFIG_DIR = "${cfg.home}/config";
+          serviceConfig.Type = "oneshot";
+          serviceConfig.User = "nextcloud";
+          serviceConfig.ExecStart = "${pkgs.php}/bin/php -f ${pkgs.nextcloud}/cron.php";
+        };
+      };
+
+      services.phpfpm = {
+        phpOptions = phpOptionsExtensions;
+        phpPackage = pkgs.php71;
+        pools.nextcloud = let
+          phpAdminValues = (toKeyValue
+            (foldr (a: b: a // b) {}
+              (mapAttrsToList (k: v: { "php_admin_value[${k}]" = v; })
+                phpOptions)));
+        in {
+          listen = "/run/phpfpm/nextcloud";
+          extraConfig = ''
+            listen.owner = nginx
+            listen.group = nginx
+            user = nextcloud
+            group = nginx
+            pm = dynamic
+            pm.max_children = 32
+            pm.start_servers = 2
+            pm.min_spare_servers = 2
+            pm.max_spare_servers = 4
+            env[NEXTCLOUD_CONFIG_DIR] = ${cfg.home}/config
+            env[PATH] = /run/wrappers/bin:/nix/var/nix/profiles/default/bin:/run/current-system/sw/bin:/usr/bin:/bin
+            ${phpAdminValues}
+          '';
+        };
+      };
+
+      users.extraUsers.nextcloud = {
+        home = "${cfg.home}";
+        group = "nginx";
+        createHome = true;
+      };
+
+      environment.systemPackages = [ occ ];
+    }
+
+    (mkIf cfg.nginx.enable {
+      services.nginx = {
+        enable = true;
+        virtualHosts = {
+          "${cfg.hostName}" = {
+            root = pkgs.nextcloud;
+            locations = {
+              "= /robots.txt" = {
+                priority = 100;
+                extraConfig = ''
+                  allow all;
+                  log_not_found off;
+                  access_log off;
+                '';
+              };
+              "/" = {
+                priority = 200;
+                extraConfig = "rewrite ^ /index.php$uri;";
+              };
+              "~ ^/store-apps" = {
+                priority = 201;
+                extraConfig = "root ${cfg.home};";
+              };
+              "= /.well-known/carddav" = {
+                priority = 210;
+                extraConfig = "return 301 $scheme://$host/remote.php/dav;";
+              };
+              "= /.well-known/caldav" = {
+                priority = 210;
+                extraConfig = "return 301 $scheme://$host/remote.php/dav;";
+              };
+              "~ ^/(?:build|tests|config|lib|3rdparty|templates|data)/" = {
+                priority = 300;
+                extraConfig = "deny all;";
+              };
+              "~ ^/(?:\\.|autotest|occ|issue|indie|db_|console)" = {
+                priority = 300;
+                extraConfig = "deny all;";
+              };
+              "~ ^/(?:index|remote|public|cron|core/ajax/update|status|ocs/v[12]|updater/.+|ocs-provider/.+)\\.php(?:$|/)" = {
+                priority = 500;
+                extraConfig = ''
+                  include ${pkgs.nginxMainline}/conf/fastcgi.conf;
+                  fastcgi_split_path_info ^(.+\.php)(/.*)$;
+                  fastcgi_param PATH_INFO $fastcgi_path_info;
+                  fastcgi_param HTTPS ${if cfg.https then "on" else "off"};
+                  fastcgi_param modHeadersAvailable true;
+                  fastcgi_param front_controller_active true;
+                  fastcgi_pass unix:/run/phpfpm/nextcloud;
+                  fastcgi_intercept_errors on;
+                  fastcgi_request_buffering off;
+                  fastcgi_read_timeout 120s;
+                '';
+              };
+              "~ ^/(?:updater|ocs-provider)(?:$|/)".extraConfig = ''
+                try_files $uri/ =404;
+                index index.php;
+              '';
+              "~ \\.(?:css|js|woff|svg|gif)$".extraConfig = ''
+                try_files $uri /index.php$uri$is_args$args;
+                add_header Cache-Control "public, max-age=15778463";
+                add_header X-Content-Type-Options nosniff;
+                add_header X-XSS-Protection "1; mode=block";
+                add_header X-Robots-Tag none;
+                add_header X-Download-Options noopen;
+                add_header X-Permitted-Cross-Domain-Policies none;
+                access_log off;
+              '';
+              "~ \\.(?:png|html|ttf|ico|jpg|jpeg)$".extraConfig = ''
+                try_files $uri /index.php$uri$is_args$args;
+                access_log off;
+              '';
+            };
+            extraConfig = ''
+              add_header X-Content-Type-Options nosniff;
+              add_header X-XSS-Protection "1; mode=block";
+              add_header X-Robots-Tag none;
+              add_header X-Download-Options noopen;
+              add_header X-Permitted-Cross-Domain-Policies none;
+              error_page 403 /core/templates/403.php;
+              error_page 404 /core/templates/404.php;
+              client_max_body_size ${cfg.maxUploadSize};
+              fastcgi_buffers 64 4K;
+              gzip on;
+              gzip_vary on;
+              gzip_comp_level 4;
+              gzip_min_length 256;
+              gzip_proxied expired no-cache no-store private no_last_modified no_etag auth;
+              gzip_types application/atom+xml application/javascript application/json application/ld+json application/manifest+json application/rss+xml application/vnd.geo+json application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/bmp image/svg+xml image/x-icon text/cache-manifest text/css text/plain text/vcard text/vnd.rim.location.xloc text/vtt text/x-component text/x-cross-domain-policy;
+
+              ${optionalString cfg.webfinger ''
+                rewrite ^/.well-known/host-meta /public.php?service=host-meta last;
+                rewrite ^/.well-known/host-meta.json /public.php?service=host-meta-json last;
+              ''}
+            '';
+          };
+        };
+      };
+    })
+  ]);
+}
diff --git a/nixos/modules/services/web-apps/tt-rss.nix b/nixos/modules/services/web-apps/tt-rss.nix
index 2b171aa1b2b2..90b35d19ea11 100644
--- a/nixos/modules/services/web-apps/tt-rss.nix
+++ b/nixos/modules/services/web-apps/tt-rss.nix
@@ -624,7 +624,11 @@ let
     };
 
     users = optionalAttrs (cfg.user == "tt_rss") {
-      users.tt_rss.group = "tt_rss";
+      users.tt_rss = {
+        description = "tt-rss service user";
+        isSystemUser = true;
+        group = "tt_rss";
+      };
       groups.tt_rss = {};
     };
   };
diff --git a/nixos/modules/services/web-servers/nginx/default.nix b/nixos/modules/services/web-servers/nginx/default.nix
index b231ee5a3f01..508398f03ace 100644
--- a/nixos/modules/services/web-servers/nginx/default.nix
+++ b/nixos/modules/services/web-servers/nginx/default.nix
@@ -245,8 +245,8 @@ let
         }
       ''
   ) virtualHosts);
-  mkLocations = locations: concatStringsSep "\n" (mapAttrsToList (location: config: ''
-    location ${location} {
+  mkLocations = locations: concatStringsSep "\n" (map (config: ''
+    location ${config.location} {
       ${optionalString (config.proxyPass != null && !cfg.proxyResolveWhileRunning)
         "proxy_pass ${config.proxyPass};"
       }
@@ -266,7 +266,18 @@ let
       ${config.extraConfig}
       ${optionalString (config.proxyPass != null && cfg.recommendedProxySettings) "include ${recommendedProxyConfig};"}
     }
-  '') locations);
+  '') (sortProperties (mapAttrsToList (k: v: v // { location = k; }) locations)));
+  mkBasicAuth = vhostName: authDef: let
+    htpasswdFile = pkgs.writeText "${vhostName}.htpasswd" (
+      concatStringsSep "\n" (mapAttrsToList (user: password: ''
+        ${user}:{PLAIN}${password}
+      '') authDef)
+    );
+  in ''
+    auth_basic secured;
+    auth_basic_user_file ${htpasswdFile};
+  '';
+
   mkHtpasswd = vhostName: authDef: pkgs.writeText "${vhostName}.htpasswd" (
     concatStringsSep "\n" (mapAttrsToList (user: password: ''
       ${user}:{PLAIN}${password}
diff --git a/nixos/modules/services/web-servers/nginx/location-options.nix b/nixos/modules/services/web-servers/nginx/location-options.nix
index 4c772734a749..9b44433d3845 100644
--- a/nixos/modules/services/web-servers/nginx/location-options.nix
+++ b/nixos/modules/services/web-servers/nginx/location-options.nix
@@ -71,6 +71,16 @@ with lib;
         These lines go to the end of the location verbatim.
       '';
     };
+
+    priority = mkOption {
+      type = types.int;
+      default = 1000;
+      description = ''
+        Order of this location block in relation to the others in the vhost.
+        The semantics are the same as with `lib.mkOrder`. Smaller values have
+        a greater priority.
+      '';
+    };
   };
 }
 
diff --git a/nixos/modules/services/x11/desktop-managers/gnome3.nix b/nixos/modules/services/x11/desktop-managers/gnome3.nix
index eb86f7b53bb6..0d5b860d4617 100644
--- a/nixos/modules/services/x11/desktop-managers/gnome3.nix
+++ b/nixos/modules/services/x11/desktop-managers/gnome3.nix
@@ -133,7 +133,6 @@ in {
 
     fonts.fonts = [ pkgs.dejavu_fonts pkgs.cantarell-fonts ];
 
-    services.xserver.displayManager.gdm.enable = mkDefault true;
     services.xserver.displayManager.extraSessionFilePackages = [ pkgs.gnome3.gnome-session ];
 
     services.xserver.displayManager.sessionCommands = ''
diff --git a/nixos/modules/services/x11/desktop-managers/plasma5.nix b/nixos/modules/services/x11/desktop-managers/plasma5.nix
index e759f69db897..11c1aa4315a8 100644
--- a/nixos/modules/services/x11/desktop-managers/plasma5.nix
+++ b/nixos/modules/services/x11/desktop-managers/plasma5.nix
@@ -64,7 +64,7 @@ in
       };
 
       security.wrappers = {
-        kcheckpass.source = "${lib.getBin plasma5.plasma-workspace}/lib/libexec/kcheckpass";
+        kcheckpass.source = "${lib.getBin plasma5.kscreenlocker}/lib/libexec/kcheckpass";
         "start_kdeinit".source = "${lib.getBin pkgs.kinit}/lib/libexec/kf5/start_kdeinit";
         kwin_wayland = {
           source = "${lib.getBin plasma5.kwin}/bin/kwin_wayland";
@@ -225,11 +225,8 @@ in
       security.pam.services.sddm.enableKwallet = true;
       security.pam.services.slim.enableKwallet = true;
 
-      # Update the start menu for each user that has `isNormalUser` set.
-      system.activationScripts.plasmaSetup = stringAfter [ "users" "groups" ]
-        (concatStringsSep "\n"
-          (mapAttrsToList (name: value: "${pkgs.su}/bin/su ${name} -c ${pkgs.libsForQt5.kservice}/bin/kbuildsycoca5")
-            (filterAttrs (n: v: v.isNormalUser) config.users.users)));
+      # Update the start menu for each user that is currently logged in
+      system.userActivationScripts.plasmaSetup = "${pkgs.libsForQt5.kservice}/bin/kbuildsycoca5";
     })
   ];
 
diff --git a/nixos/modules/services/x11/display-managers/default.nix b/nixos/modules/services/x11/display-managers/default.nix
index 357fa8ce8f36..26b79730dd38 100644
--- a/nixos/modules/services/x11/display-managers/default.nix
+++ b/nixos/modules/services/x11/display-managers/default.nix
@@ -222,6 +222,17 @@ in
         description = "List of arguments for the X server.";
       };
 
+      setupCommands = mkOption {
+        type = types.lines;
+        default = "";
+        description = ''
+          Shell commands executed just after the X server has started.
+
+          This option is only effective for display managers for which this feature
+          is supported; currently these are LightDM, GDM and SDDM.
+        '';
+      };
+
       sessionCommands = mkOption {
         type = types.lines;
         default = "";
diff --git a/nixos/modules/services/x11/display-managers/gdm.nix b/nixos/modules/services/x11/display-managers/gdm.nix
index a775dd0f0e04..6cc30b218f4a 100644
--- a/nixos/modules/services/x11/display-managers/gdm.nix
+++ b/nixos/modules/services/x11/display-managers/gdm.nix
@@ -7,6 +7,13 @@ let
   cfg = config.services.xserver.displayManager;
   gdm = pkgs.gnome3.gdm;
 
+  xSessionWrapper = if (cfg.setupCommands == "") then null else
+    pkgs.writeScript "gdm-x-session-wrapper" ''
+      #!${pkgs.bash}/bin/bash
+      ${cfg.setupCommands}
+      exec "$@"
+    '';
+
 in
 
 {
@@ -112,6 +119,11 @@ in
           GDM_SESSIONS_DIR = "${cfg.session.desktops}/share/xsessions";
           # Find the mouse
           XCURSOR_PATH = "~/.icons:${pkgs.gnome3.adwaita-icon-theme}/share/icons";
+        } // optionalAttrs (xSessionWrapper != null) {
+          # Make GDM use this wrapper before running the session, which runs the
+          # configured setupCommands. This relies on a patched GDM which supports
+          # this environment variable.
+          GDM_X_SESSION_WRAPPER = "${xSessionWrapper}";
         };
         execCmd = "exec ${gdm}/bin/gdm";
       };
@@ -142,7 +154,10 @@ in
 
     systemd.user.services.dbus.wantedBy = [ "default.target" ];
 
-    programs.dconf.profiles.gdm = "${gdm}/share/dconf/profile/gdm";
+    programs.dconf.profiles.gdm = pkgs.writeText "dconf-gdm-profile" ''
+      system-db:local
+      ${gdm}/share/dconf/profile/gdm
+    '';
 
     # Use AutomaticLogin if delay is zero, because it's immediate.
     # Otherwise with TimedLogin with zero seconds the prompt is still
diff --git a/nixos/modules/services/x11/display-managers/lightdm-greeters/enso-os.nix b/nixos/modules/services/x11/display-managers/lightdm-greeters/enso-os.nix
new file mode 100644
index 000000000000..7c794b1ba175
--- /dev/null
+++ b/nixos/modules/services/x11/display-managers/lightdm-greeters/enso-os.nix
@@ -0,0 +1,159 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+let
+  dmcfg = config.services.xserver.displayManager;
+  ldmcfg = dmcfg.lightdm;
+  cfg = ldmcfg.greeters.enso;
+
+  theme = cfg.theme.package;
+  icons = cfg.iconTheme.package;
+  cursors = cfg.cursorTheme.package;
+
+  # We need a few things in the environment for the greeter to run with
+  # fonts/icons.
+  wrappedEnsoGreeter = pkgs.runCommand "lightdm-enso-os-greeter"
+    { buildInputs = [ pkgs.makeWrapper ]; }
+    ''
+      # This wrapper ensures that we actually get themes
+      makeWrapper ${pkgs.lightdm-enso-os-greeter}/bin/pantheon-greeter \
+        $out/greeter \
+        --prefix PATH : "${pkgs.glibc.bin}/bin" \
+        --set GDK_PIXBUF_MODULE_FILE "${pkgs.librsvg.out}/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache" \
+        --set GTK_PATH "${theme}:${pkgs.gtk3.out}" \
+        --set GTK_EXE_PREFIX "${theme}" \
+        --set GTK_DATA_PREFIX "${theme}" \
+        --set XDG_DATA_DIRS "${theme}/share:${icons}/share:${cursors}/share" \
+        --set XDG_CONFIG_HOME "${theme}/share"
+
+      cat - > $out/lightdm-enso-os-greeter.desktop << EOF
+      [Desktop Entry]
+      Name=LightDM Greeter
+      Comment=This runs the LightDM Greeter
+      Exec=$out/greeter
+      Type=Application
+      EOF
+    '';
+
+  ensoGreeterConf = pkgs.writeText "lightdm-enso-os-greeter.conf" ''
+    [greeter]
+    default-wallpaper=${ldmcfg.background}
+    gtk-theme=${cfg.theme.name}
+    icon-theme=${cfg.iconTheme.name}
+    cursor-theme=${cfg.cursorTheme.name}
+    blur=${toString cfg.blur}
+    brightness=${toString cfg.brightness}
+    ${cfg.extraConfig}
+  '';
+in {
+  options = {
+    services.xserver.displayManager.lightdm.greeters.enso = {
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to enable enso-os-greeter as the lightdm greeter
+        '';
+      };
+
+      theme = {
+        package = mkOption {
+          type = types.package;
+          default = pkgs.gnome3.gnome-themes-extra;
+          defaultText = "pkgs.gnome3.gnome-themes-extra";
+          description = ''
+            The package path that contains the theme given in the name option.
+          '';
+        };
+
+        name = mkOption {
+          type = types.str;
+          default = "Adwaita";
+          description = ''
+            Name of the theme to use for the lightdm-enso-os-greeter
+          '';
+        };
+      };
+
+      iconTheme = {
+        package = mkOption {
+          type = types.package;
+          default = pkgs.papirus-icon-theme;
+          defaultText = "pkgs.papirus-icon-theme";
+          description = ''
+            The package path that contains the icon theme given in the name option.
+          '';
+        };
+
+        name = mkOption {
+          type = types.str;
+          default = "ePapirus";
+          description = ''
+            Name of the icon theme to use for the lightdm-enso-os-greeter
+          '';
+        };
+      };
+
+      cursorTheme = {
+        package = mkOption {
+          type = types.package;
+          default = pkgs.capitaine-cursors;
+          defaultText = "pkgs.capitaine-cursors";
+          description = ''
+            The package path that contains the cursor theme given in the name option.
+          '';
+        };
+
+        name = mkOption {
+          type = types.str;
+          default = "capitane-cursors";
+          description = ''
+            Name of the cursor theme to use for the lightdm-enso-os-greeter
+          '';
+        };
+      };
+
+      blur = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether or not to enable blur
+        '';
+      };
+
+      brightness = mkOption {
+        type = types.int;
+        default = 7;
+        description = ''
+          Brightness
+        '';
+      };
+
+      extraConfig = mkOption {
+        type = types.lines;
+        default = "";
+        description = ''
+          Extra configuration that should be put in the greeter.conf
+          configuration file
+        '';
+      };
+    };
+  };
+
+  config = mkIf (ldmcfg.enable && cfg.enable) {
+    environment.etc."lightdm/greeter.conf".source = ensoGreeterConf;
+
+    services.xserver.displayManager.lightdm = {
+      greeter = mkDefault {
+        package = wrappedEnsoGreeter;
+        name = "lightdm-enso-os-greeter";
+      };
+
+      greeters = {
+        gtk = {
+          enable = mkDefault false;
+        };
+      };
+    };
+  };
+}
diff --git a/nixos/modules/services/x11/display-managers/lightdm.nix b/nixos/modules/services/x11/display-managers/lightdm.nix
index 8078b93a7574..a685dbfff2a0 100644
--- a/nixos/modules/services/x11/display-managers/lightdm.nix
+++ b/nixos/modules/services/x11/display-managers/lightdm.nix
@@ -46,6 +46,7 @@ let
         greeters-directory = ${cfg.greeter.package}
       ''}
       sessions-directory = ${dmcfg.session.desktops}/share/xsessions
+      ${cfg.extraConfig}
 
       [Seat:*]
       xserver-command = ${xserverWrapper}
@@ -61,6 +62,12 @@ let
       ${optionalString hasDefaultUserSession ''
         user-session=${defaultSessionName}
       ''}
+      ${optionalString (dmcfg.setupCommands != "") ''
+        display-setup-script=${pkgs.writeScript "lightdm-display-setup" ''
+          #!${pkgs.bash}/bin/bash
+          ${dmcfg.setupCommands}
+        ''}
+      ''}
       ${cfg.extraSeatDefaults}
     '';
 
@@ -73,6 +80,7 @@ in
   imports = [
     ./lightdm-greeters/gtk.nix
     ./lightdm-greeters/mini.nix
+    ./lightdm-greeters/enso-os.nix
   ];
 
   options = {
@@ -113,6 +121,15 @@ in
         };
       };
 
+      extraConfig = mkOption {
+        type = types.lines;
+        default = "";
+        example = ''
+          user-authority-in-system-dir = true
+        '';
+        description = "Extra lines to append to LightDM section.";
+      };
+
       background = mkOption {
         type = types.str;
         default = "${pkgs.nixos-artwork.wallpapers.simple-dark-gray-bottom}/share/artwork/gnome/nix-wallpaper-simple-dark-gray_bottom.png";
diff --git a/nixos/modules/services/x11/display-managers/sddm.nix b/nixos/modules/services/x11/display-managers/sddm.nix
index 2a9826177737..522a0dc92d6f 100644
--- a/nixos/modules/services/x11/display-managers/sddm.nix
+++ b/nixos/modules/services/x11/display-managers/sddm.nix
@@ -20,6 +20,7 @@ let
   Xsetup = pkgs.writeScript "Xsetup" ''
     #!/bin/sh
     ${cfg.setupScript}
+    ${dmcfg.setupCommands}
   '';
 
   Xstop = pkgs.writeScript "Xstop" ''
@@ -137,7 +138,8 @@ in
           xrandr --auto
         '';
         description = ''
-          A script to execute when starting the display server.
+          A script to execute when starting the display server. DEPRECATED, please
+          use <option>services.xserver.displayManager.setupCommands</option>.
         '';
       };
 
diff --git a/nixos/modules/services/x11/display-managers/startx.nix b/nixos/modules/services/x11/display-managers/startx.nix
new file mode 100644
index 000000000000..15609540a6e7
--- /dev/null
+++ b/nixos/modules/services/x11/display-managers/startx.nix
@@ -0,0 +1,44 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.xserver.displayManager.startx;
+
+in
+
+{
+
+  ###### interface
+
+  options = {
+    services.xserver.displayManager.startx = {
+      enable = mkOption {
+        default = false;
+        description = ''
+          Whether to enable the dummy "startx" pseudo-display manager,
+          which allows users to start X manually via the "startx" command
+          from a vt shell. The X server runs under the user's id, not as root.
+          The user must provide a ~/.xinintrc file containing session startup
+          commands, see startx(1). This is not autmatically generated
+          from the desktopManager and windowManager settings.
+        '';
+      };
+    };
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+    services.xserver = {
+      exportConfiguration = true;
+      displayManager.job.execCmd = "";
+      displayManager.lightdm.enable = lib.mkForce false;
+    };
+    systemd.services.display-manager.enable = false;
+    environment.systemPackages =  with pkgs; [ xorg.xinit ];
+  };
+
+}
diff --git a/nixos/modules/services/x11/xserver.nix b/nixos/modules/services/x11/xserver.nix
index 75bfeaac1fa3..297e36311656 100644
--- a/nixos/modules/services/x11/xserver.nix
+++ b/nixos/modules/services/x11/xserver.nix
@@ -374,6 +374,12 @@ in
         description = "Contents of the first Monitor section of the X server configuration file.";
       };
 
+      extraConfig = mkOption {
+        type = types.lines;
+        default = "";
+        description = "Additional contents (sections) included in the X server configuration file";
+      };
+
       xrandrHeads = mkOption {
         default = [];
         example = [
@@ -754,6 +760,7 @@ in
             Driver "${driver.driverName or driver.name}"
             ${if cfg.useGlamor then ''Option "AccelMethod" "glamor"'' else ""}
             ${cfg.deviceSection}
+            ${driver.deviceSection or ""}
             ${xrandrDeviceSection}
           EndSection
 
@@ -765,6 +772,7 @@ in
             ''}
 
             ${cfg.screenSection}
+            ${driver.screenSection or ""}
 
             ${optionalString (cfg.defaultDepth != 0) ''
               DefaultDepth ${toString cfg.defaultDepth}
@@ -794,6 +802,8 @@ in
         '')}
 
         ${xrandrMonitorSections}
+
+        ${cfg.extraConfig}
       '';
 
     fonts.enableDefaultFonts = mkDefault true;
diff --git a/nixos/modules/system/activation/activation-script.nix b/nixos/modules/system/activation/activation-script.nix
index 93a1b13a81dd..b1eaf0189562 100644
--- a/nixos/modules/system/activation/activation-script.nix
+++ b/nixos/modules/system/activation/activation-script.nix
@@ -100,6 +100,52 @@ in
             exit $_status
           '';
       };
+    };
+
+    system.userActivationScripts = mkOption {
+      default = {};
+
+      example = literalExample ''
+        { plasmaSetup = {
+            text = '''
+              ${pkgs.libsForQt5.kservice}/bin/kbuildsycoca5"
+            ''';
+            deps = [];
+          };
+        }
+      '';
+
+      description = ''
+        A set of shell script fragments that are executed by a systemd user
+        service when a NixOS system configuration is activated. Examples are
+        rebuilding the .desktop file cache for showing applications in the menu.
+        Since these are executed every time you run
+        <command>nixos-rebuild</command>, it's important that they are
+        idempotent and fast.
+      '';
+
+      type = types.attrsOf types.unspecified;
+
+      apply = set: {
+        script = ''
+          unset PATH
+          for i in ${toString path}; do
+            PATH=$PATH:$i/bin:$i/sbin
+          done
+
+          _status=0
+          trap "_status=1 _localstatus=\$?" ERR
+
+          ${
+            let
+              set' = mapAttrs (n: v: if isString v then noDepEntry v else v) set;
+              withHeadlines = addAttributeName set';
+            in textClosureMap id (withHeadlines) (attrNames withHeadlines)
+          }
+
+          exit $_status
+        '';
+      };
 
     };
 
@@ -128,14 +174,6 @@ in
       ''
         # Various log/runtime directories.
 
-        mkdir -m 0755 -p /run/nix/current-load # for distributed builds
-        mkdir -m 0700 -p /run/nix/remote-stores
-
-        mkdir -m 0755 -p /var/log
-
-        touch /var/log/wtmp /var/log/lastlog # must exist
-        chmod 644 /var/log/wtmp /var/log/lastlog
-
         mkdir -m 1777 -p /var/tmp
 
         # Empty, immutable home directory of many system accounts.
@@ -177,6 +215,14 @@ in
         source ${config.system.build.earlyMountScript}
       '';
 
+    systemd.user = {
+      services.nixos-activation = {
+        description = "Run user specific NixOS activation";
+        script = config.system.userActivationScripts.script;
+        unitConfig.ConditionUser = "!@system";
+        serviceConfig.Type = "oneshot";
+      };
+    };
   };
 
 }
diff --git a/nixos/modules/system/activation/switch-to-configuration.pl b/nixos/modules/system/activation/switch-to-configuration.pl
index c3e469e4b8a1..397b308b7311 100644
--- a/nixos/modules/system/activation/switch-to-configuration.pl
+++ b/nixos/modules/system/activation/switch-to-configuration.pl
@@ -419,7 +419,8 @@ while (my $f = <$listActiveUsers>) {
     my ($uid, $name) = ($+{uid}, $+{user});
     print STDERR "reloading user units for $name...\n";
 
-    system("su", "-s", "@shell@", "-l", $name, "-c", "XDG_RUNTIME_DIR=/run/user/$uid @systemd@/bin/systemctl --user daemon-reload");
+    system("@su@", "-s", "@shell@", "-l", $name, "-c", "XDG_RUNTIME_DIR=/run/user/$uid @systemd@/bin/systemctl --user daemon-reload");
+    system("@su@", "-s", "@shell@", "-l", $name, "-c", "XDG_RUNTIME_DIR=/run/user/$uid @systemd@/bin/systemctl --user start nixos-activation.service");
 }
 
 close $listActiveUsers;
diff --git a/nixos/modules/system/activation/top-level.nix b/nixos/modules/system/activation/top-level.nix
index 413543df88c6..a560af5ce96d 100644
--- a/nixos/modules/system/activation/top-level.nix
+++ b/nixos/modules/system/activation/top-level.nix
@@ -109,6 +109,7 @@ let
     inherit (pkgs) utillinux coreutils;
     systemd = config.systemd.package;
     shell = "${pkgs.bash}/bin/sh";
+    su = "${pkgs.shadow.su}/bin/su";
 
     inherit children;
     kernelParams = config.boot.kernelParams;
diff --git a/nixos/modules/system/boot/initrd-network.nix b/nixos/modules/system/boot/initrd-network.nix
index 384ae909b701..dd0ea69e9685 100644
--- a/nixos/modules/system/boot/initrd-network.nix
+++ b/nixos/modules/system/boot/initrd-network.nix
@@ -6,11 +6,22 @@ let
 
   cfg = config.boot.initrd.network;
 
+  dhcpinterfaces = lib.attrNames (lib.filterAttrs (iface: v: v.useDHCP == true) (config.networking.interfaces or {}));
+
   udhcpcScript = pkgs.writeScript "udhcp-script"
     ''
       #! /bin/sh
       if [ "$1" = bound ]; then
         ip address add "$ip/$mask" dev "$interface"
+        if [ -n "$mtu" ]; then
+          ip link set mtu "$mtu" dev "$interface"
+        fi
+        if [ -n "$staticroutes" ]; then
+          echo "$staticroutes" \
+            | sed -r "s@(\S+) (\S+)@ ip route add \"\1\" via \"\2\" dev \"$interface\" ; @g" \
+            | sed -r "s@ via \"0\.0\.0\.0\"@@g" \
+            | /bin/sh
+        fi
         if [ -n "$router" ]; then
           ip route add "$router" dev "$interface" # just in case if "$router" is not within "$ip/$mask" (e.g. Hetzner Cloud)
           ip route add default via "$router" dev "$interface"
@@ -93,18 +104,24 @@ in
       ''
 
       # Otherwise, use DHCP.
-      + optionalString config.networking.useDHCP ''
+      + optionalString (config.networking.useDHCP || dhcpinterfaces != []) ''
         if [ -z "$hasNetwork" ]; then
 
           # Bring up all interfaces.
-          for iface in $(cd /sys/class/net && ls); do
+          for iface in $(ls /sys/class/net/); do
             echo "bringing up network interface $iface..."
             ip link set "$iface" up
           done
 
-          # Acquire a DHCP lease.
-          echo "acquiring IP address via DHCP..."
-          udhcpc --quit --now --script ${udhcpcScript} ${udhcpcArgs} && hasNetwork=1
+          # Acquire DHCP leases.
+          for iface in ${ if config.networking.useDHCP then
+                            "$(ls /sys/class/net/ | grep -v ^lo$)"
+                          else
+                            lib.concatMapStringsSep " " lib.escapeShellArg dhcpinterfaces
+                        }; do
+            echo "acquiring IP address via DHCP on $iface..."
+            udhcpc --quit --now -i $iface -O staticroutes --script ${udhcpcScript} ${udhcpcArgs} && hasNetwork=1
+          done
         fi
       ''
 
diff --git a/nixos/modules/system/boot/kexec.nix b/nixos/modules/system/boot/kexec.nix
index 3e5d7b40f2c5..61f9c6d0e7eb 100644
--- a/nixos/modules/system/boot/kexec.nix
+++ b/nixos/modules/system/boot/kexec.nix
@@ -1,7 +1,7 @@
 { pkgs, lib, ... }:
 
 {
-  config = lib.mkIf (pkgs.kexectools.meta.available) {
+  config = lib.mkIf (lib.any (lib.meta.platformMatch pkgs.stdenv.hostPlatform) pkgs.kexectools.meta.platforms) {
     environment.systemPackages = [ pkgs.kexectools ];
 
     systemd.services."prepare-kexec" =
diff --git a/nixos/modules/system/boot/stage-2-init.sh b/nixos/modules/system/boot/stage-2-init.sh
index 49764b75a557..03daafa1ce4f 100644
--- a/nixos/modules/system/boot/stage-2-init.sh
+++ b/nixos/modules/system/boot/stage-2-init.sh
@@ -152,6 +152,14 @@ ln -sfn /run/booted-system /nix/var/nix/gcroots/booted-system
 @shell@ @postBootCommands@
 
 
+# Ensure systemd doesn't try to populate /etc, by forcing its first-boot
+# heuristic off. It doesn't matter what's in /etc/machine-id for this purpose,
+# and systemd will immediately fill in the file when it starts, so just
+# creating it is enough. This `: >>` pattern avoids forking and avoids changing
+# the mtime if the file already exists.
+: >> /etc/machine-id
+
+
 # Reset the logging file descriptors.
 exec 1>&$logOutFd 2>&$logErrFd
 exec {logOutFd}>&- {logErrFd}>&-
diff --git a/nixos/modules/system/boot/systemd-lib.nix b/nixos/modules/system/boot/systemd-lib.nix
index 9c8d4a026b4a..68a40377ee13 100644
--- a/nixos/modules/system/boot/systemd-lib.nix
+++ b/nixos/modules/system/boot/systemd-lib.nix
@@ -63,7 +63,7 @@ in rec {
 
   assertValueOneOf = name: values: group: attr:
     optional (attr ? ${name} && !elem attr.${name} values)
-      "Systemd ${group} field `${name}' cannot have value `${attr.${name}}'.";
+      "Systemd ${group} field `${name}' cannot have value `${toString attr.${name}}'.";
 
   assertHasField = name: group: attr:
     optional (!(attr ? ${name}))
diff --git a/nixos/modules/system/boot/systemd-unit-options.nix b/nixos/modules/system/boot/systemd-unit-options.nix
index 2cff25a8c854..5f2bec5c34ae 100644
--- a/nixos/modules/system/boot/systemd-unit-options.nix
+++ b/nixos/modules/system/boot/systemd-unit-options.nix
@@ -394,7 +394,7 @@ in rec {
         Each attribute in this set specifies an option in the
         <literal>[Timer]</literal> section of the unit.  See
         <citerefentry><refentrytitle>systemd.timer</refentrytitle>
-        <manvolnum>7</manvolnum></citerefentry> and
+        <manvolnum>5</manvolnum></citerefentry> and
         <citerefentry><refentrytitle>systemd.time</refentrytitle>
         <manvolnum>7</manvolnum></citerefentry> for details.
       '';
diff --git a/nixos/modules/system/boot/systemd.nix b/nixos/modules/system/boot/systemd.nix
index 12e029ae57f8..a1412bc32904 100644
--- a/nixos/modules/system/boot/systemd.nix
+++ b/nixos/modules/system/boot/systemd.nix
@@ -747,6 +747,7 @@ in
 
       "systemd/journald.conf".text = ''
         [Journal]
+        Storage=persistent
         RateLimitInterval=${config.services.journald.rateLimitInterval}
         RateLimitBurst=${toString config.services.journald.rateLimitBurst}
         ${optionalString (config.services.journald.console != "") ''
@@ -783,19 +784,6 @@ in
 
     services.dbus.enable = true;
 
-    system.activationScripts.systemd = stringAfter [ "groups" ]
-      ''
-        mkdir -m 0755 -p /var/lib/udev
-
-        if ! [ -e /etc/machine-id ]; then
-          ${systemd}/bin/systemd-machine-id-setup
-        fi
-
-        # Keep a persistent journal. Note that systemd-tmpfiles will
-        # set proper ownership/permissions.
-        mkdir -m 0700 -p /var/log/journal
-      '';
-
     users.users.systemd-network.uid = config.ids.uids.systemd-network;
     users.groups.systemd-network.gid = config.ids.gids.systemd-network;
     users.users.systemd-resolve.uid = config.ids.uids.systemd-resolve;
@@ -886,6 +874,9 @@ in
     #systemd.services.systemd-logind.restartTriggers = [ config.environment.etc."systemd/logind.conf".source ];
     systemd.services.systemd-logind.restartIfChanged = false;
     systemd.services.systemd-logind.stopIfChanged = false;
+    # The user-runtime-dir@ service is managed by systemd-logind we should not touch it or else we break the users' sessions.
+    systemd.services."user-runtime-dir@".stopIfChanged = false;
+    systemd.services."user-runtime-dir@".restartIfChanged = false;
     systemd.services.systemd-journald.restartTriggers = [ config.environment.etc."systemd/journald.conf".source ];
     systemd.services.systemd-journald.stopIfChanged = false;
     systemd.targets.local-fs.unitConfig.X-StopOnReconfiguration = true;
diff --git a/nixos/modules/testing/test-instrumentation.nix b/nixos/modules/testing/test-instrumentation.nix
index ed4cfa7805e2..aa0db4afd978 100644
--- a/nixos/modules/testing/test-instrumentation.nix
+++ b/nixos/modules/testing/test-instrumentation.nix
@@ -55,7 +55,8 @@ with import ../../lib/qemu-flags.nix { inherit pkgs; };
     systemd.services."serial-getty@hvc0".enable = false;
 
     # Only use a serial console, no TTY.
-    virtualisation.qemu.consoles = [ qemuSerialDevice ];
+    # hvc1: socket backdoor, see "Debugging NixOS tests" section in NixOS manual
+    virtualisation.qemu.consoles = [ "hvc1" qemuSerialDevice ];
 
     boot.initrd.preDeviceCommands =
       ''
diff --git a/nixos/modules/virtualisation/container-config.nix b/nixos/modules/virtualisation/container-config.nix
index 5e368acd6d8b..561db7cabcfb 100644
--- a/nixos/modules/virtualisation/container-config.nix
+++ b/nixos/modules/virtualisation/container-config.nix
@@ -22,6 +22,13 @@ with lib;
     # Not supported in systemd-nspawn containers.
     security.audit.enable = false;
 
+    # Make sure that root user in container will talk to host nix-daemon
+    environment.etc."profile".text = ''
+    export NIX_REMOTE=daemon
+    '';
+
+
+
   };
 
 }
diff --git a/nixos/modules/virtualisation/hyperv-guest.nix b/nixos/modules/virtualisation/hyperv-guest.nix
index ecd2a8117710..0f1f052880c5 100644
--- a/nixos/modules/virtualisation/hyperv-guest.nix
+++ b/nixos/modules/virtualisation/hyperv-guest.nix
@@ -9,20 +9,47 @@ in {
   options = {
     virtualisation.hypervGuest = {
       enable = mkEnableOption "Hyper-V Guest Support";
+
+      videoMode = mkOption {
+        type = types.str;
+        default = "1152x864";
+        example = "1024x768";
+        description = ''
+          Resolution at which to initialize the video adapter.
+
+          Supports screen resolution up to Full HD 1920x1080 with 32 bit color
+          on Windows Server 2012, and 1600x1200 with 16 bit color on Windows
+          Server 2008 R2 or earlier.
+        '';
+      };
     };
   };
 
   config = mkIf cfg.enable {
+    boot = {
+      initrd.kernelModules = [
+        "hv_balloon" "hv_netvsc" "hv_storvsc" "hv_utils" "hv_vmbus"
+      ];
+
+      kernelParams = [
+        "video=hyperv_fb:${cfg.videoMode}"
+      ];
+    };
+
     environment.systemPackages = [ config.boot.kernelPackages.hyperv-daemons.bin ];
 
     security.rngd.enable = false;
 
-    # enable hotadding memory
+    # enable hotadding cpu/memory
     services.udev.packages = lib.singleton (pkgs.writeTextFile {
-      name = "hyperv-memory-hotadd-udev-rules";
-      destination = "/etc/udev/rules.d/99-hyperv-memory-hotadd.rules";
+      name = "hyperv-cpu-and-memory-hotadd-udev-rules";
+      destination = "/etc/udev/rules.d/99-hyperv-cpu-and-memory-hotadd.rules";
       text = ''
-        ACTION="add", SUBSYSTEM=="memory", ATTR{state}="online"
+        # Memory hotadd
+        SUBSYSTEM=="memory", ACTION=="add", DEVPATH=="/devices/system/memory/memory[0-9]*", TEST=="state", ATTR{state}="online"
+
+        # CPU hotadd
+        SUBSYSTEM=="cpu", ACTION=="add", DEVPATH=="/devices/system/cpu/cpu[0-9]*", TEST=="online", ATTR{online}="1"
       '';
     });
 
diff --git a/nixos/release.nix b/nixos/release.nix
index cce2c54f02bf..8016dba09152 100644
--- a/nixos/release.nix
+++ b/nixos/release.nix
@@ -1,10 +1,12 @@
-{ nixpkgs ? { outPath = (import ../lib).cleanSource ./..; revCount = 130979; shortRev = "gfedcba"; }
+with import ../lib;
+
+{ nixpkgs ? { outPath = cleanSource ./..; revCount = 130979; shortRev = "gfedcba"; }
 , stableBranch ? false
 , supportedSystems ? [ "x86_64-linux" "aarch64-linux" ]
+, configuration ? {}
 }:
 
 with import ../pkgs/top-level/release-lib.nix { inherit supportedSystems; };
-with import ../lib;
 
 let
 
@@ -51,7 +53,7 @@ let
 
     hydraJob ((import lib/eval-config.nix {
       inherit system;
-      modules = [ module versionModule { isoImage.isoBaseName = "nixos-${type}"; } ];
+      modules = [ configuration module versionModule { isoImage.isoBaseName = "nixos-${type}"; } ];
     }).config.system.build.isoImage);
 
 
@@ -62,7 +64,7 @@ let
 
     hydraJob ((import lib/eval-config.nix {
       inherit system;
-      modules = [ module versionModule ];
+      modules = [ configuration module versionModule ];
     }).config.system.build.sdImage);
 
 
@@ -75,7 +77,7 @@ let
 
       config = (import lib/eval-config.nix {
         inherit system;
-        modules = [ module versionModule ];
+        modules = [ configuration module versionModule ];
       }).config;
 
       tarball = config.system.build.tarball;
@@ -95,16 +97,19 @@ let
 
   buildFromConfig = module: sel: forAllSystems (system: hydraJob (sel (import ./lib/eval-config.nix {
     inherit system;
-    modules = [ module versionModule ] ++ singleton
+    modules = [ configuration module versionModule ] ++ singleton
       ({ ... }:
       { fileSystems."/".device  = mkDefault "/dev/sda1";
         boot.loader.grub.device = mkDefault "/dev/sda";
       });
   }).config));
 
-  makeNetboot = config:
+  makeNetboot = { module, system, ... }:
     let
-      configEvaled = import lib/eval-config.nix config;
+      configEvaled = import lib/eval-config.nix {
+        inherit system;
+        modules = [ module versionModule ];
+      };
       build = configEvaled.config.system.build;
       kernelTarget = configEvaled.pkgs.stdenv.hostPlatform.platform.kernelTarget;
     in
@@ -140,11 +145,8 @@ in rec {
   initialRamdisk = buildFromConfig ({ ... }: { }) (config: config.system.build.initialRamdisk);
 
   netboot = forMatchingSystems [ "x86_64-linux" "aarch64-linux" ] (system: makeNetboot {
+    module = ./modules/installer/netboot/netboot-minimal.nix;
     inherit system;
-    modules = [
-      ./modules/installer/netboot/netboot-minimal.nix
-      versionModule
-    ];
   });
 
   iso_minimal = forAllSystems (system: makeIso {
@@ -248,6 +250,7 @@ in rec {
   tests.acme = callTest tests/acme.nix {};
   tests.avahi = callTest tests/avahi.nix {};
   tests.beegfs = callTest tests/beegfs.nix {};
+  tests.upnp = callTest tests/upnp.nix {};
   tests.bittorrent = callTest tests/bittorrent.nix {};
   tests.bind = callTest tests/bind.nix {};
   #tests.blivet = callTest tests/blivet.nix {};   # broken since 2017-07024
@@ -360,6 +363,7 @@ in rec {
   tests.netdata = callTest tests/netdata.nix { };
   tests.networking.networkd = callSubTests tests/networking.nix { networkd = true; };
   tests.networking.scripted = callSubTests tests/networking.nix { networkd = false; };
+  tests.nextcloud = callSubTests tests/nextcloud { };
   # TODO: put in networking.nix after the test becomes more complete
   tests.networkingProxy = callTest tests/networking-proxy.nix {};
   tests.nexus = callTest tests/nexus.nix { };
diff --git a/nixos/tests/bittorrent.nix b/nixos/tests/bittorrent.nix
index 609b1ff7a83a..8977be9b859f 100644
--- a/nixos/tests/bittorrent.nix
+++ b/nixos/tests/bittorrent.nix
@@ -13,57 +13,95 @@ let
   # Some random file to serve.
   file = pkgs.hello.src;
 
-  miniupnpdConf = nodes: pkgs.writeText "miniupnpd.conf"
-    ''
-      ext_ifname=eth1
-      listening_ip=${(pkgs.lib.head nodes.router.config.networking.interfaces.eth2.ipv4.addresses).address}/24
-      allow 1024-65535 192.168.2.0/24 1024-65535
-    '';
-
+  internalRouterAddress = "192.168.3.1";
+  internalClient1Address = "192.168.3.2";
+  externalRouterAddress = "80.100.100.1";
+  externalClient2Address = "80.100.100.2";
+  externalTrackerAddress = "80.100.100.3";
 in
 
 {
   name = "bittorrent";
   meta = with pkgs.stdenv.lib.maintainers; {
-    maintainers = [ domenkozar eelco chaoflow rob wkennington ];
+    maintainers = [ domenkozar eelco chaoflow rob wkennington bobvanderlinden ];
   };
 
   nodes =
     { tracker =
         { pkgs, ... }:
-        { environment.systemPackages = [ pkgs.transmission pkgs.opentracker ];
+        { environment.systemPackages = [ pkgs.transmission ];
+
+          virtualisation.vlans = [ 1 ];
+          networking.interfaces.eth1.ipv4.addresses = [
+            { address = externalTrackerAddress; prefixLength = 24; }
+          ];
 
           # We need Apache on the tracker to serve the torrents.
           services.httpd.enable = true;
           services.httpd.adminAddr = "foo@example.org";
           services.httpd.documentRoot = "/tmp";
 
-          networking.firewall.enable = false; # FIXME: figure out what ports we actually need
+          networking.firewall.enable = false;
+
+          services.opentracker.enable = true;
+
+          services.transmission.enable = true;
+          services.transmission.settings.dht-enabled = false;
+          services.transmission.settings.port-forwaring-enabled = false;
         };
 
       router =
-        { pkgs, ... }:
-        { environment.systemPackages = [ pkgs.miniupnpd ];
-          virtualisation.vlans = [ 1 2 ];
+        { pkgs, nodes, ... }:
+        { virtualisation.vlans = [ 1 2 ];
           networking.nat.enable = true;
           networking.nat.internalInterfaces = [ "eth2" ];
           networking.nat.externalInterface = "eth1";
-          networking.firewall.enable = false;
+          networking.firewall.enable = true;
+          networking.firewall.trustedInterfaces = [ "eth2" ];
+          networking.interfaces.eth0.ipv4.addresses = [];
+          networking.interfaces.eth1.ipv4.addresses = [
+            { address = externalRouterAddress; prefixLength = 24; }
+          ];
+          networking.interfaces.eth2.ipv4.addresses = [
+            { address = internalRouterAddress; prefixLength = 24; }
+          ];
+          services.miniupnpd = {
+            enable = true;
+            externalInterface = "eth1";
+            internalIPs = [ "eth2" ];
+            appendConfig = ''
+              ext_ip=${externalRouterAddress}
+            '';
+          };
         };
 
       client1 =
         { pkgs, nodes, ... }:
-        { environment.systemPackages = [ pkgs.transmission ];
+        { environment.systemPackages = [ pkgs.transmission pkgs.miniupnpc ];
           virtualisation.vlans = [ 2 ];
-          networking.defaultGateway =
-            (pkgs.lib.head nodes.router.config.networking.interfaces.eth2.ipv4.addresses).address;
+          networking.interfaces.eth0.ipv4.addresses = [];
+          networking.interfaces.eth1.ipv4.addresses = [
+            { address = internalClient1Address; prefixLength = 24; }
+          ];
+          networking.defaultGateway = internalRouterAddress;
           networking.firewall.enable = false;
+          services.transmission.enable = true;
+          services.transmission.settings.dht-enabled = false;
+          services.transmission.settings.message-level = 3;
         };
 
       client2 =
         { pkgs, ... }:
         { environment.systemPackages = [ pkgs.transmission ];
+          virtualisation.vlans = [ 1 ];
+          networking.interfaces.eth0.ipv4.addresses = [];
+          networking.interfaces.eth1.ipv4.addresses = [
+            { address = externalClient2Address; prefixLength = 24; }
+          ];
           networking.firewall.enable = false;
+          services.transmission.enable = true;
+          services.transmission.settings.dht-enabled = false;
+          services.transmission.settings.port-forwaring-enabled = false;
         };
     };
 
@@ -72,43 +110,38 @@ in
     ''
       startAll;
 
-      # Enable NAT on the router and start miniupnpd.
-      $router->waitForUnit("nat");
-      $router->succeed(
-          "iptables -w -t nat -N MINIUPNPD",
-          "iptables -w -t nat -A PREROUTING -i eth1 -j MINIUPNPD",
-          "echo 1 > /proc/sys/net/ipv4/ip_forward",
-          "miniupnpd -f ${miniupnpdConf nodes}"
-      );
+      # Wait for network and miniupnpd.
+      $router->waitForUnit("network-online.target");
+      $router->waitForUnit("miniupnpd");
 
       # Create the torrent.
       $tracker->succeed("mkdir /tmp/data");
       $tracker->succeed("cp ${file} /tmp/data/test.tar.bz2");
-      $tracker->succeed("transmission-create /tmp/data/test.tar.bz2 -p -t http://${(pkgs.lib.head nodes.tracker.config.networking.interfaces.eth1.ipv4.addresses).address}:6969/announce -o /tmp/test.torrent");
+      $tracker->succeed("transmission-create /tmp/data/test.tar.bz2 --private --tracker http://${externalTrackerAddress}:6969/announce --outfile /tmp/test.torrent");
       $tracker->succeed("chmod 644 /tmp/test.torrent");
 
       # Start the tracker.  !!! use a less crappy tracker
-      $tracker->waitForUnit("network.target");
-      $tracker->succeed("opentracker -p 6969 >&2 &");
+      $tracker->waitForUnit("network-online.target");
+      $tracker->waitForUnit("opentracker.service");
       $tracker->waitForOpenPort(6969);
 
       # Start the initial seeder.
-      my $pid = $tracker->succeed("transmission-cli /tmp/test.torrent -M -w /tmp/data >&2 & echo \$!");
+      $tracker->succeed("transmission-remote --add /tmp/test.torrent --no-portmap --no-dht --download-dir /tmp/data");
 
       # Now we should be able to download from the client behind the NAT.
       $tracker->waitForUnit("httpd");
-      $client1->waitForUnit("network.target");
-      $client1->succeed("transmission-cli http://tracker/test.torrent -w /tmp >&2 &");
+      $client1->waitForUnit("network-online.target");
+      $client1->succeed("transmission-remote --add http://${externalTrackerAddress}/test.torrent --download-dir /tmp >&2 &");
       $client1->waitForFile("/tmp/test.tar.bz2");
       $client1->succeed("cmp /tmp/test.tar.bz2 ${file}");
 
       # Bring down the initial seeder.
-      $tracker->succeed("kill -9 $pid");
+      # $tracker->stopJob("transmission");
 
       # Now download from the second client.  This can only succeed if
       # the first client created a NAT hole in the router.
-      $client2->waitForUnit("network.target");
-      $client2->succeed("transmission-cli http://tracker/test.torrent -M -w /tmp >&2 &");
+      $client2->waitForUnit("network-online.target");
+      $client2->succeed("transmission-remote --add http://${externalTrackerAddress}/test.torrent --no-portmap --no-dht --download-dir /tmp >&2 &");
       $client2->waitForFile("/tmp/test.tar.bz2");
       $client2->succeed("cmp /tmp/test.tar.bz2 ${file}");
     '';
diff --git a/nixos/tests/codimd.nix b/nixos/tests/codimd.nix
index 9dedac96844a..562f6f24f999 100644
--- a/nixos/tests/codimd.nix
+++ b/nixos/tests/codimd.nix
@@ -40,8 +40,7 @@ import ./make-test.nix ({ pkgs, lib, ... }:
     subtest "CodiMD sqlite", sub {
       $codimdSqlite->waitForUnit("codimd.service");
       $codimdSqlite->waitForOpenPort(3000);
-      $codimdSqlite->sleep(10); # avoid 503 during startup
-      $codimdSqlite->succeed("curl -sSf http://localhost:3000/new");
+      $codimdSqlite->waitUntilSucceeds("curl -sSf http://localhost:3000/new");
     };
 
     subtest "CodiMD postgres", sub {
@@ -49,8 +48,7 @@ import ./make-test.nix ({ pkgs, lib, ... }:
       $codimdPostgres->waitForUnit("codimd.service");
       $codimdPostgres->waitForOpenPort(5432);
       $codimdPostgres->waitForOpenPort(3000);
-      $codimdPostgres->sleep(10); # avoid 503 during startup
-      $codimdPostgres->succeed("curl -sSf http://localhost:3000/new");
+      $codimdPostgres->waitUntilSucceeds("curl -sSf http://localhost:3000/new");
     };
   '';
 })
diff --git a/nixos/tests/containers-imperative.nix b/nixos/tests/containers-imperative.nix
index 6f86819f4e88..782095a09dad 100644
--- a/nixos/tests/containers-imperative.nix
+++ b/nixos/tests/containers-imperative.nix
@@ -86,6 +86,9 @@ import ./make-test.nix ({ pkgs, ...} : {
       # Execute commands via the root shell.
       $machine->succeed("nixos-container run $id1 -- uname") =~ /Linux/ or die;
 
+      # Execute a nix command via the root shell. (regression test for #40355)
+      $machine->succeed("nixos-container run $id1 -- nix-instantiate -E 'derivation { name = \"empty\"; builder = \"false\"; system = \"false\"; }'");
+
       # Stop and start (regression test for #4989)
       $machine->succeed("nixos-container stop $id1");
       $machine->succeed("nixos-container start $id1");
diff --git a/nixos/tests/docker-tools.nix b/nixos/tests/docker-tools.nix
index 5a7590cbf364..360b32faae72 100644
--- a/nixos/tests/docker-tools.nix
+++ b/nixos/tests/docker-tools.nix
@@ -58,5 +58,9 @@ import ./make-test.nix ({ pkgs, ... }: {
       # Ensure Docker images can use an unstable date
       $docker->succeed("docker load --input='${pkgs.dockerTools.examples.bash}'");
       $docker->succeed("[ '1970-01-01T00:00:01Z' != \"\$(docker inspect ${pkgs.dockerTools.examples.unstableDate.imageName} | ${pkgs.jq}/bin/jq -r .[].Created)\" ]");
+
+      # Ensure Layered Docker images work
+      $docker->succeed("docker load --input='${pkgs.dockerTools.examples.layered-image}'");
+      $docker->succeed("docker run --rm ${pkgs.dockerTools.examples.layered-image.imageName}");
     '';
 })
diff --git a/nixos/tests/misc.nix b/nixos/tests/misc.nix
index 6d72ac997f8d..3ad55651b112 100644
--- a/nixos/tests/misc.nix
+++ b/nixos/tests/misc.nix
@@ -78,6 +78,8 @@ import ./make-test.nix ({ pkgs, ...} : rec {
 
       # Test whether we have a reboot record in wtmp.
       subtest "reboot-wtmp", sub {
+          $machine->shutdown;
+          $machine->waitForUnit('multi-user.target');
           $machine->succeed("last | grep reboot >&2");
       };
 
diff --git a/nixos/tests/nextcloud/basic.nix b/nixos/tests/nextcloud/basic.nix
new file mode 100644
index 000000000000..c3b710f0f904
--- /dev/null
+++ b/nixos/tests/nextcloud/basic.nix
@@ -0,0 +1,56 @@
+import ../make-test.nix ({ pkgs, ...}: let
+  adminpass = "notproduction";
+  adminuser = "root";
+in {
+  name = "nextcloud-basic";
+  meta = with pkgs.stdenv.lib.maintainers; {
+    maintainers = [ globin eqyiel ];
+  };
+
+  nodes = {
+    # The only thing the client needs to do is download a file.
+    client = { ... }: {};
+
+    nextcloud = { config, pkgs, ... }: {
+      networking.firewall.allowedTCPPorts = [ 80 ];
+
+      services.nextcloud = {
+        enable = true;
+        nginx.enable = true;
+        hostName = "nextcloud";
+        config = {
+          # Don't inherit adminuser since "root" is supposed to be the default
+          inherit adminpass;
+        };
+      };
+    };
+  };
+
+  testScript = let
+    withRcloneEnv = pkgs.writeScript "with-rclone-env" ''
+      #!${pkgs.stdenv.shell}
+      export RCLONE_CONFIG_NEXTCLOUD_TYPE=webdav
+      export RCLONE_CONFIG_NEXTCLOUD_URL="http://nextcloud/remote.php/webdav/"
+      export RCLONE_CONFIG_NEXTCLOUD_VENDOR="nextcloud"
+      export RCLONE_CONFIG_NEXTCLOUD_USER="${adminuser}"
+      export RCLONE_CONFIG_NEXTCLOUD_PASS="$(${pkgs.rclone}/bin/rclone obscure ${adminpass})"
+      "''${@}"
+    '';
+    copySharedFile = pkgs.writeScript "copy-shared-file" ''
+      #!${pkgs.stdenv.shell}
+      echo 'hi' | ${withRcloneEnv} ${pkgs.rclone}/bin/rclone rcat nextcloud:test-shared-file
+    '';
+
+    diffSharedFile = pkgs.writeScript "diff-shared-file" ''
+      #!${pkgs.stdenv.shell}
+      diff <(echo 'hi') <(${pkgs.rclone}/bin/rclone cat nextcloud:test-shared-file)
+    '';
+  in ''
+    startAll();
+    $nextcloud->waitForUnit("multi-user.target");
+    $nextcloud->succeed("curl -sSf http://nextcloud/login");
+    $nextcloud->succeed("${withRcloneEnv} ${copySharedFile}");
+    $client->waitForUnit("multi-user.target");
+    $client->succeed("${withRcloneEnv} ${diffSharedFile}");
+  '';
+})
diff --git a/nixos/tests/nextcloud/default.nix b/nixos/tests/nextcloud/default.nix
new file mode 100644
index 000000000000..66da6794b961
--- /dev/null
+++ b/nixos/tests/nextcloud/default.nix
@@ -0,0 +1,6 @@
+{ system ? builtins.currentSystem }:
+{
+  basic = import ./basic.nix { inherit system; };
+  with-postgresql-and-redis = import ./with-postgresql-and-redis.nix { inherit system; };
+  with-mysql-and-memcached = import ./with-mysql-and-memcached.nix { inherit system; };
+}
diff --git a/nixos/tests/nextcloud/with-mysql-and-memcached.nix b/nixos/tests/nextcloud/with-mysql-and-memcached.nix
new file mode 100644
index 000000000000..c0d347238b47
--- /dev/null
+++ b/nixos/tests/nextcloud/with-mysql-and-memcached.nix
@@ -0,0 +1,97 @@
+import ../make-test.nix ({ pkgs, ...}: let
+  adminpass = "hunter2";
+  adminuser = "root";
+in {
+  name = "nextcloud-with-mysql-and-memcached";
+  meta = with pkgs.stdenv.lib.maintainers; {
+    maintainers = [ eqyiel ];
+  };
+
+  nodes = {
+    # The only thing the client needs to do is download a file.
+    client = { ... }: {};
+
+    nextcloud = { config, pkgs, ... }: {
+      networking.firewall.allowedTCPPorts = [ 80 ];
+
+      services.nextcloud = {
+        enable = true;
+        hostName = "nextcloud";
+        nginx.enable = true;
+        https = true;
+        caching = {
+          apcu = true;
+          redis = false;
+          memcached = true;
+        };
+        config = {
+          dbtype = "mysql";
+          dbname = "nextcloud";
+          dbuser = "nextcloud";
+          dbhost = "127.0.0.1";
+          dbport = 3306;
+          dbpass = "hunter2";
+          # Don't inherit adminuser since "root" is supposed to be the default
+          inherit adminpass;
+        };
+      };
+
+      services.mysql = {
+        enable = true;
+        bind = "127.0.0.1";
+        package = pkgs.mariadb;
+        initialScript = pkgs.writeText "mysql-init" ''
+          CREATE USER 'nextcloud'@'localhost' IDENTIFIED BY 'hunter2';
+          CREATE DATABASE IF NOT EXISTS nextcloud;
+          GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, INDEX, ALTER,
+            CREATE TEMPORARY TABLES ON nextcloud.* TO 'nextcloud'@'localhost'
+            IDENTIFIED BY 'hunter2';
+          FLUSH privileges;
+        '';
+      };
+
+      systemd.services."nextcloud-setup"= {
+        requires = ["mysql.service"];
+        after = ["mysql.service"];
+      };
+
+      services.memcached.enable = true;
+    };
+  };
+
+  testScript = let
+    configureMemcached = pkgs.writeScript "configure-memcached" ''
+      #!${pkgs.stdenv.shell}
+      nextcloud-occ config:system:set memcached_servers 0 0 --value 127.0.0.1 --type string
+      nextcloud-occ config:system:set memcached_servers 0 1 --value 11211 --type integer
+      nextcloud-occ config:system:set memcache.local --value '\OC\Memcache\APCu' --type string
+      nextcloud-occ config:system:set memcache.distributed --value '\OC\Memcache\Memcached' --type string
+    '';
+    withRcloneEnv = pkgs.writeScript "with-rclone-env" ''
+      #!${pkgs.stdenv.shell}
+      export RCLONE_CONFIG_NEXTCLOUD_TYPE=webdav
+      export RCLONE_CONFIG_NEXTCLOUD_URL="http://nextcloud/remote.php/webdav/"
+      export RCLONE_CONFIG_NEXTCLOUD_VENDOR="nextcloud"
+      export RCLONE_CONFIG_NEXTCLOUD_USER="${adminuser}"
+      export RCLONE_CONFIG_NEXTCLOUD_PASS="$(${pkgs.rclone}/bin/rclone obscure ${adminpass})"
+    '';
+    copySharedFile = pkgs.writeScript "copy-shared-file" ''
+      #!${pkgs.stdenv.shell}
+      echo 'hi' | ${pkgs.rclone}/bin/rclone rcat nextcloud:test-shared-file
+    '';
+
+    diffSharedFile = pkgs.writeScript "diff-shared-file" ''
+      #!${pkgs.stdenv.shell}
+      diff <(echo 'hi') <(${pkgs.rclone}/bin/rclone cat nextcloud:test-shared-file)
+    '';
+  in ''
+    startAll();
+    $nextcloud->waitForUnit("multi-user.target");
+    $nextcloud->succeed("${configureMemcached}");
+    $nextcloud->succeed("curl -sSf http://nextcloud/login");
+    $nextcloud->succeed("${withRcloneEnv} ${copySharedFile}");
+    $client->waitForUnit("multi-user.target");
+    $client->succeed("${withRcloneEnv} ${diffSharedFile}");
+
+  '';
+})
diff --git a/nixos/tests/nextcloud/with-postgresql-and-redis.nix b/nixos/tests/nextcloud/with-postgresql-and-redis.nix
new file mode 100644
index 000000000000..0351d4db69ac
--- /dev/null
+++ b/nixos/tests/nextcloud/with-postgresql-and-redis.nix
@@ -0,0 +1,130 @@
+import ../make-test.nix ({ pkgs, ...}: let
+  adminpass = "hunter2";
+  adminuser = "custom-admin-username";
+in {
+  name = "nextcloud-with-postgresql-and-redis";
+  meta = with pkgs.stdenv.lib.maintainers; {
+    maintainers = [ eqyiel ];
+  };
+
+  nodes = {
+    # The only thing the client needs to do is download a file.
+    client = { ... }: {};
+
+    nextcloud = { config, pkgs, ... }: {
+      networking.firewall.allowedTCPPorts = [ 80 ];
+
+      services.nextcloud = {
+        enable = true;
+        hostName = "nextcloud";
+        nginx.enable = true;
+        caching = {
+          apcu = false;
+          redis = true;
+          memcached = false;
+        };
+        config = {
+          dbtype = "pgsql";
+          dbname = "nextcloud";
+          dbuser = "nextcloud";
+          dbhost = "localhost";
+          dbpassFile = toString (pkgs.writeText "db-pass-file" ''
+            hunter2
+          '');
+          inherit adminuser;
+          adminpassFile = toString (pkgs.writeText "admin-pass-file" ''
+            ${adminpass}
+          '');
+        };
+      };
+
+      services.redis = {
+        unixSocket = "/var/run/redis/redis.sock";
+        enable = true;
+        extraConfig = ''
+          unixsocketperm 770
+        '';
+      };
+
+      systemd.services.redis = {
+        preStart = ''
+          mkdir -p /var/run/redis
+          chown ${config.services.redis.user}:${config.services.nginx.group} /var/run/redis
+        '';
+        serviceConfig.PermissionsStartOnly = true;
+      };
+
+      systemd.services."nextcloud-setup"= {
+        requires = ["postgresql.service"];
+        after = [
+          "postgresql.service"
+          "chown-redis-socket.service"
+        ];
+      };
+
+      # At the time of writing, redis creates its socket with the "nobody"
+      # group.  I figure this is slightly less bad than making the socket world
+      # readable.
+      systemd.services."chown-redis-socket" = {
+        enable = true;
+        script = ''
+          until ${pkgs.redis}/bin/redis-cli ping; do
+            echo "waiting for redis..."
+            sleep 1
+          done
+          chown ${config.services.redis.user}:${config.services.nginx.group} /var/run/redis/redis.sock
+        '';
+        after = [ "redis.service" ];
+        requires = [ "redis.service" ];
+        wantedBy = [ "redis.service" ];
+        serviceConfig = {
+          Type = "oneshot";
+        };
+      };
+
+      services.postgresql = {
+        enable = true;
+        initialScript = pkgs.writeText "psql-init" ''
+          create role nextcloud with login password 'hunter2';
+          create database nextcloud with owner nextcloud;
+        '';
+      };
+    };
+  };
+
+  testScript = let
+    configureRedis = pkgs.writeScript "configure-redis" ''
+      #!${pkgs.stdenv.shell}
+      nextcloud-occ config:system:set redis 'host' --value '/var/run/redis/redis.sock' --type string
+      nextcloud-occ config:system:set redis 'port' --value 0 --type integer
+      nextcloud-occ config:system:set memcache.local --value '\OC\Memcache\Redis' --type string
+      nextcloud-occ config:system:set memcache.locking --value '\OC\Memcache\Redis' --type string
+    '';
+    withRcloneEnv = pkgs.writeScript "with-rclone-env" ''
+      #!${pkgs.stdenv.shell}
+      export RCLONE_CONFIG_NEXTCLOUD_TYPE=webdav
+      export RCLONE_CONFIG_NEXTCLOUD_URL="http://nextcloud/remote.php/webdav/"
+      export RCLONE_CONFIG_NEXTCLOUD_VENDOR="nextcloud"
+      export RCLONE_CONFIG_NEXTCLOUD_USER="${adminuser}"
+      export RCLONE_CONFIG_NEXTCLOUD_PASS="$(${pkgs.rclone}/bin/rclone obscure ${adminpass})"
+      "''${@}"
+    '';
+    copySharedFile = pkgs.writeScript "copy-shared-file" ''
+      #!${pkgs.stdenv.shell}
+      echo 'hi' | ${pkgs.rclone}/bin/rclone rcat nextcloud:test-shared-file
+    '';
+
+    diffSharedFile = pkgs.writeScript "diff-shared-file" ''
+      #!${pkgs.stdenv.shell}
+      diff <(echo 'hi') <(${pkgs.rclone}/bin/rclone cat nextcloud:test-shared-file)
+    '';
+  in ''
+    startAll();
+    $nextcloud->waitForUnit("multi-user.target");
+    $nextcloud->succeed("${configureRedis}");
+    $nextcloud->succeed("curl -sSf http://nextcloud/login");
+    $nextcloud->succeed("${withRcloneEnv} ${copySharedFile}");
+    $client->waitForUnit("multi-user.target");
+    $client->succeed("${withRcloneEnv} ${diffSharedFile}");
+  '';
+})
diff --git a/nixos/tests/nix-ssh-serve.nix b/nixos/tests/nix-ssh-serve.nix
index aa366d8612d7..494d55121eb1 100644
--- a/nixos/tests/nix-ssh-serve.nix
+++ b/nixos/tests/nix-ssh-serve.nix
@@ -14,8 +14,8 @@ in
              keys = [ snakeOilPublicKey ];
              protocol = "ssh-ng";
            };
-         server.nix.package = pkgs.nixUnstable;
-         client.nix.package = pkgs.nixUnstable;
+         server.nix.package = pkgs.nix;
+         client.nix.package = pkgs.nix;
        };
      testScript = ''
        startAll;
diff --git a/nixos/tests/rspamd.nix b/nixos/tests/rspamd.nix
index 6b2e2dd3a531..a12622b6aa0b 100644
--- a/nixos/tests/rspamd.nix
+++ b/nixos/tests/rspamd.nix
@@ -13,13 +13,10 @@ let
     $machine->succeed("[[ \"\$(stat -c %G ${socket})\" == \"${group}\" ]]");
     $machine->succeed("[[ \"\$(stat -c %a ${socket})\" == \"${mode}\" ]]");
   '';
-  simple = name: socketActivation: enableIPv6: makeTest {
+  simple = name: enableIPv6: makeTest {
     name = "rspamd-${name}";
     machine = {
-      services.rspamd = {
-        enable = true;
-        socketActivation = socketActivation;
-      };
+      services.rspamd.enable = true;
       networking.enableIPv6 = enableIPv6;
     };
     testScript = ''
@@ -32,13 +29,6 @@ let
       sleep 10;
       $machine->log($machine->succeed("cat /etc/rspamd.conf"));
       $machine->log($machine->succeed("systemctl cat rspamd.service"));
-      ${if socketActivation then ''
-        $machine->log($machine->succeed("systemctl cat rspamd-controller-1.socket"));
-        $machine->log($machine->succeed("systemctl cat rspamd-normal-1.socket"));
-      '' else ''
-        $machine->fail("systemctl cat rspamd-controller-1.socket");
-        $machine->fail("systemctl cat rspamd-normal-1.socket");
-      ''}
       $machine->log($machine->succeed("curl http://localhost:11334/auth"));
       $machine->log($machine->succeed("curl http://127.0.0.1:11334/auth"));
       ${optionalString enableIPv6 ''
@@ -48,10 +38,8 @@ let
   };
 in
 {
-  simple = simple "simple" false true;
-  ipv4only = simple "ipv4only" false false;
-  simple-socketActivated = simple "simple-socketActivated" true true;
-  ipv4only-socketActivated = simple "ipv4only-socketActivated" true false;
+  simple = simple "simple" true;
+  ipv4only = simple "ipv4only" false;
   deprecated = makeTest {
     name = "rspamd-deprecated";
     machine = {
@@ -68,7 +56,6 @@ in
       ${checkSocket "/run/rspamd.sock" "root" "root" "600" }
       ${checkSocket "/run/rspamd-worker.sock" "root" "root" "666" }
       $machine->log($machine->succeed("cat /etc/rspamd.conf"));
-      $machine->fail("systemctl cat rspamd-normal-1.socket");
       $machine->log($machine->succeed("rspamc -h /run/rspamd-worker.sock stat"));
       $machine->log($machine->succeed("curl --unix-socket /run/rspamd-worker.sock http://localhost/ping"));
     '';
@@ -79,7 +66,6 @@ in
     machine = {
       services.rspamd = {
         enable = true;
-        socketActivation = false;
         workers.normal.bindSockets = [{
           socket = "/run/rspamd.sock";
           mode = "0600";
@@ -101,38 +87,6 @@ in
       ${checkSocket "/run/rspamd.sock" "root" "root" "600" }
       ${checkSocket "/run/rspamd-worker.sock" "root" "root" "666" }
       $machine->log($machine->succeed("cat /etc/rspamd.conf"));
-      $machine->fail("systemctl cat rspamd-normal-1.socket");
-      $machine->log($machine->succeed("rspamc -h /run/rspamd-worker.sock stat"));
-      $machine->log($machine->succeed("curl --unix-socket /run/rspamd-worker.sock http://localhost/ping"));
-    '';
-  };
-  socketActivated = makeTest {
-    name = "rspamd-socketActivated";
-    machine = {
-      services.rspamd = {
-        enable = true;
-        workers.normal.bindSockets = [{
-          socket = "/run/rspamd.sock";
-          mode = "0600";
-          owner = "root";
-          group = "root";
-        }];
-        workers.controller.bindSockets = [{
-          socket = "/run/rspamd-worker.sock";
-          mode = "0666";
-          owner = "root";
-          group = "root";
-        }];
-      };
-    };
-
-    testScript = ''
-      startAll
-      $machine->waitForFile("/run/rspamd.sock");
-      ${checkSocket "/run/rspamd.sock" "root" "root" "600" }
-      ${checkSocket "/run/rspamd-worker.sock" "root" "root" "666" }
-      $machine->log($machine->succeed("cat /etc/rspamd.conf"));
-      $machine->log($machine->succeed("systemctl cat rspamd-normal-1.socket"));
       $machine->log($machine->succeed("rspamc -h /run/rspamd-worker.sock stat"));
       $machine->log($machine->succeed("curl --unix-socket /run/rspamd-worker.sock http://localhost/ping"));
     '';
diff --git a/nixos/tests/upnp.nix b/nixos/tests/upnp.nix
new file mode 100644
index 000000000000..3f2dd13fb560
--- /dev/null
+++ b/nixos/tests/upnp.nix
@@ -0,0 +1,94 @@
+# This tests whether UPnP port mappings can be created using Miniupnpd
+# and Miniupnpc.
+# It runs a Miniupnpd service on one machine, and verifies
+# a client can indeed create a port mapping using Miniupnpc. If
+# this succeeds an external client will try to connect to the port
+# mapping.
+
+import ./make-test.nix ({ pkgs, ... }:
+
+let
+  internalRouterAddress = "192.168.3.1";
+  internalClient1Address = "192.168.3.2";
+  externalRouterAddress = "80.100.100.1";
+  externalClient2Address = "80.100.100.2";
+in
+{
+  name = "upnp";
+  meta = with pkgs.stdenv.lib.maintainers; {
+    maintainers = [ bobvanderlinden ];
+  };
+
+  nodes =
+    {
+      router =
+        { pkgs, nodes, ... }:
+        { virtualisation.vlans = [ 1 2 ];
+          networking.nat.enable = true;
+          networking.nat.internalInterfaces = [ "eth2" ];
+          networking.nat.externalInterface = "eth1";
+          networking.firewall.enable = true;
+          networking.firewall.trustedInterfaces = [ "eth2" ];
+          networking.interfaces.eth1.ipv4.addresses = [
+            { address = externalRouterAddress; prefixLength = 24; }
+          ];
+          networking.interfaces.eth2.ipv4.addresses = [
+            { address = internalRouterAddress; prefixLength = 24; }
+          ];
+          services.miniupnpd = {
+            enable = true;
+            externalInterface = "eth1";
+            internalIPs = [ "eth2" ];
+            appendConfig = ''
+              ext_ip=${externalRouterAddress}
+            '';
+          };
+        };
+
+      client1 =
+        { pkgs, nodes, ... }:
+        { environment.systemPackages = [ pkgs.miniupnpc pkgs.netcat ];
+          virtualisation.vlans = [ 2 ];
+          networking.defaultGateway = internalRouterAddress;
+          networking.interfaces.eth1.ipv4.addresses = [
+            { address = internalClient1Address; prefixLength = 24; }
+          ];
+          networking.firewall.enable = false;
+
+          services.httpd.enable = true;
+          services.httpd.listen = [{ ip = "*"; port = 9000; }];
+          services.httpd.adminAddr = "foo@example.org";
+          services.httpd.documentRoot = "/tmp";
+        };
+
+      client2 =
+        { pkgs, ... }:
+        { environment.systemPackages = [ pkgs.miniupnpc ];
+          virtualisation.vlans = [ 1 ];
+          networking.interfaces.eth1.ipv4.addresses = [
+            { address = externalClient2Address; prefixLength = 24; }
+          ];
+          networking.firewall.enable = false;
+        };
+    };
+
+  testScript =
+    { nodes, ... }:
+    ''
+      startAll;
+
+      # Wait for network and miniupnpd.
+      $router->waitForUnit("network-online.target");
+      # $router->waitForUnit("nat");
+      $router->waitForUnit("firewall.service");
+      $router->waitForUnit("miniupnpd");
+
+      $client1->waitForUnit("network-online.target");
+
+      $client1->succeed("upnpc -a ${internalClient1Address} 9000 9000 TCP");
+
+      $client1->waitForUnit("httpd");
+      $client2->waitUntilSucceeds("curl http://${externalRouterAddress}:9000/");
+    '';
+
+})