diff --git a/pkgs/by-name/c3/c3c/package.nix b/pkgs/by-name/c3/c3c/package.nix
index e12ca87d951f..5cae5d2671c4 100644
--- a/pkgs/by-name/c3/c3c/package.nix
+++ b/pkgs/by-name/c3/c3c/package.nix
@@ -13,13 +13,13 @@
 
 llvmPackages.stdenv.mkDerivation (finalAttrs: {
   pname = "c3c";
-  version = "0.6.5";
+  version = "0.6.6";
 
   src = fetchFromGitHub {
     owner = "c3lang";
     repo = "c3c";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-2OxUHnmFtT/TunfO+fOBOrkaHKlnqpO1wJWs79wkvAY=";
+    hash = "sha256-+rNj1SmiBYBw3Ncx2uS8X5OA/qDvJ8SFpZOQVRCgvmM=";
   };
 
   postPatch = ''