cctag: move to pkgs/by-name

this shouldn't create any rebuilds

pkgs/by-name/cc/cctag/package.nix

@@ -1,6 +1,6 @@
 {
   lib,
-  stdenv,
+  clangStdenv,
   fetchFromGitHub,
 
   cmake,
@@ -9,9 +9,11 @@
   opencv,
   onetbb,
 
-  avx2Support ? stdenv.hostPlatform.avx2Support,
+  avx2Support ? clangStdenv.hostPlatform.avx2Support,
 }:
-
+let
+  stdenv = clangStdenv;
+in
 stdenv.mkDerivation rec {
   pname = "cctag";
   version = "1.0.4";

pkgs/top-level/all-packages.nix

@@ -6645,10 +6645,6 @@ with pkgs;
 
   ormolu = lib.getBin (haskell.lib.compose.justStaticExecutables haskellPackages.ormolu);
 
-  cctag = callPackage ../development/libraries/cctag {
-    stdenv = clangStdenv;
-  };
-
   ceedling = callPackage ../development/tools/ceedling { };
 
   celt = callPackage ../development/libraries/celt { };