diff options
Diffstat (limited to 'nixos/doc')
| -rw-r--r-- | nixos/doc/manual/release-notes/rl-1809.xml | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/nixos/doc/manual/release-notes/rl-1809.xml b/nixos/doc/manual/release-notes/rl-1809.xml index 5799354c6e99..72f96f1ca1a2 100644 --- a/nixos/doc/manual/release-notes/rl-1809.xml +++ b/nixos/doc/manual/release-notes/rl-1809.xml @@ -178,9 +178,26 @@ $ nix-instantiate -E '(import <nixpkgsunstable> {}).gitFull' </listitem> <listitem> <para> - <literal>lib.traceValIfNot</literal> has been deprecated. Use - <literal>if/then/else</literal> and <literal>lib.traceValSeq</literal> - instead. + 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> +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. + </para> + </listitem> + <listitem> + <para> + <literal>lib.traceValIfNot</literal> has been deprecated. Use + <literal>if/then/else</literal> and <literal>lib.traceValSeq</literal> instead. </para> </listitem> <listitem> |