anchor.diff:  
     # The suffix of the binary to link as 'astcenc'
     mainBinary = builtins.replaceStrings
  -    [ "AVX2" "SSE41"  "SSE2" "NEON" "NONE" ]
  -    [ "avx2" "sse4.1" "sse2" "neon" "none" ]
  +    [ "AVX2" "SSE41"  "SSE2" "NEON" "NONE" "NATIVE" ]
  +    [ "avx2" "sse4.1" "sse2" "neon" "none" "native" ]
       ( builtins.head isas );
   };
   
  -gccStdenv.mkDerivation rec {
  +stdenv.mkDerivation rec {
     pname = "astc-encoder";
     version = "4.2.0";
   
  
positive.code:     platforms = platforms.unix;
      license = licenses.asl20;
      maintainers = with maintainers; [ dasisdormax ];
      broken = !gccStdenv.is64bit;
    };
  }
  
negative.code: with rec {
    # SIMD instruction sets to compile for. If none are specified by the user,
    # an appropriate one is selected based on the detected host system
    isas = with stdenv.hostPlatform;
      if simdExtensions != null then lib.toList simdExtensions
      else if avx2Support then [ "AVX2" ]
      else if sse4_1Support then [ "SSE41" ]
  