anchor.diff:  }:
   # glslang requires custom versions of spirv-tools and spirb-headers.
   # The exact versions are taken from:
  -# https://github.com/KhronosGroup/glslang/blob/master/known_good.json
  +# https://github.com/KhronosGroup/glslang/blob/${version}/known_good.json
   
   let
     localSpirv-tools = if argSpirv-tools == null
  
positive.code:     inherit (src.meta) homepage;
      description = "Khronos reference front-end for GLSL and ESSL";
      license = licenses.asl20;
      platforms = platforms.linux;
      maintainers = [ maintainers.ralith ];
    };
  }
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "glslang";
    version = "11.1.0";
  
    src = fetchFromGitHub {
      owner = "KhronosGroup";
      repo = "glslang";
      rev = version;
      sha256 = "1j81pghy7whyr8ygk7lx6g6qph61rky7fkkc8xp87c7n695a48rw";
    };
  
    # These get set at all-packages, keep onto them for child drvs
  