1 files changed, 23 insertions, 0 deletions
diff --git a/pkgs/development/tools/analysis/rr/unstable.nix b/pkgs/development/tools/analysis/rr/unstable.nix
new file mode 100644
index 000000000000..82b644f76ae6
--- /dev/null
+++ b/pkgs/development/tools/analysis/rr/unstable.nix
@@ -0,0 +1,23 @@
+# This is a temporary copy of the default.nix in this folder, with the version updated to the current tip of rr's master branch.
+# This exists because rr has not had a release in a long time, but there have been a lot of improvements including UX.
+# Some of the UX improvements help prevent foot shooting.
+# Upstream has stated that it should be fine to use master.
+# This file, and its attribute in all-packages, can be removed once rr makes a release.
+# For further information, please see https://github.com/NixOS/nixpkgs/issues/99535 "Improve support for the rr debugger in nixos containers"
+
+{ callPackage, fetchFromGitHub }:
+
+let
+  rr = callPackage ./. {};
+in
+
+  rr.overrideAttrs (old: {
+    version = "unstable-2020-10-04";
+
+    src = fetchFromGitHub {
+      owner = "mozilla";
+      repo = "rr";
+      rev = "9ff375813a740a0a6ebcdfcebc58bd61ab68c667";
+      sha256 = "0raifs6cg5ckpi2445inhy3hfhp4p89s1lkx9z17mcc2g1c1phf5";
+    };
+  })