sierra-gtk-theme 2021-05-24 -> 20191216 https://repology.org/project/sierra-gtk-theme/versions
attrpath: sierra-gtk-theme
Checking auto update branch...
No auto update branch exists
[version] 
[version] updated version and sha256
[rustCrateVersion] 
[rustCrateVersion] No cargoSha256 or cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorSha256 or vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] skipping because derivation has no updateScript
Diff after rewrites:
diff --git a/pkgs/data/themes/sierra/default.nix b/pkgs/data/themes/sierra/default.nix
index e87f64661419..99aeb0ea36d0 100644
--- a/pkgs/data/themes/sierra/default.nix
+++ b/pkgs/data/themes/sierra/default.nix
@@ -22,13 +22,13 @@ lib.checkListOfEnum "${pname}: size variants" [ "standard" "compact" ] sizeVaria
 
 stdenv.mkDerivation {
   inherit pname;
-  version = "unstable-2021-05-24";
+  version = "unstable-20191216";
 
   src = fetchFromGitHub {
     owner = "vinceliuice";
     repo = pname;
     rev = "05899001c4fc2fec87c4d222cb3997c414e0affd";
-    sha256 = "174l5mryc34ma1r42pk6572c6i9hmzr9vj1a6w06nqz5qcfm1hds";
+    sha256 = "sha256-usFQHcPlY2sANyrInfKvMEXDxClmXkFyUJUM5nMtlJw=";
   };
 
   nativeBuildInputs = [

Source url did not change.