c3c unstable-2021-07-30 -> 0.5.4 https://github.com/c3lang/c3c/releases
attrpath: c3c
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/development/compilers/c3c/default.nix b/pkgs/development/compilers/c3c/default.nix
index b68ffc045f64..d8fa4d35da0d 100644
--- a/pkgs/development/compilers/c3c/default.nix
+++ b/pkgs/development/compilers/c3c/default.nix
@@ -7,13 +7,13 @@
 
 llvmPackages.stdenv.mkDerivation rec {
   pname = "c3c";
-  version = "unstable-2021-07-30";
+  version = "0.5.4";
 
   src = fetchFromGitHub {
     owner = "c3lang";
     repo = pname;
     rev = "2246b641b16e581aec9059c8358858e10a548d94";
-    sha256 = "VdMKdQsedDQCnsmTxO4HnBj5GH/EThspnotvrAscSqE=";
+    sha256 = "sha256-VdMKdQsedDQCnsmTxO4HnBj5GH/EThspnotvrAscSqE=";
   };
 
   nativeBuildInputs = [ cmake ];

Source url did not change.