feat(overlays): Add nixpkgs-mozilla overlay

1 files changed, 17 insertions, 0 deletions

diff --git a/overlays/firefox-mozilla/default.nix b/overlays/firefox-mozilla/default.nix
new file mode 100644
index 0000000..1b2cb1b
--- /dev/null
+++ b/overlays/firefox-mozilla/default.nix
@@ -0,0 +1,17 @@
+let
+  # https://github.com/NixOS/nixpkgs/blob/607aeee18d5c4de0cddfdfbebd595930051c9618/lib/trivial.nix#L504-L515
+  inPureEvalMode = ! builtins ? currentSystem;
+
+  rev = "ad7af231a95acf65ccc4afa0c766f5c0674ad3f1";
+  src = builtins.fetchTarball {
+      url = "https://github.com/mozilla/nixpkgs-mozilla/archive/${rev}.tar.gz";
+      # This locks the overlay definition version, but **not** the packages version
+      sha256 = "sha256:0j7m3ay5zcnijg0vqnqyf618n66x5zgk9p4j2zas1c0gyqzh1bqr";
+    };
+in
+  final: prev: {
+    mozilla = if inPureEvalMode then
+                  abort "mozilla/nixpkgs-mozilla firefox packages are not reproducible! Use --impure!"
+              else
+                  ((import "${src}/firefox-overlay.nix") final prev).latest;
+  }