anchor.diff:      description = "AcoustID audio fingerprinting library";
       maintainers = with maintainers; [ ehmry ];
       license = licenses.lgpl21Plus;
  -    platforms = platforms.linux;
  +    platforms = platforms.unix;
     };
   }
  
positive.code: 
    nativeBuildInputs = [ cmake ];
  
    buildInputs = [ boost ffmpeg ];
  
    cmakeFlags = [ "-DBUILD_EXAMPLES=ON" "-DBUILD_TOOLS=ON" ];
  
  
negative.code: { lib, stdenv, fetchurl, cmake, boost, ffmpeg, zlib }:
  
  let frameworks = (import <nixpkgs> {}).darwin.apple_sdk.frameworks;
  in stdenv.mkDerivation rec {
    pname = "chromaprint";
    version = "1.5.0";
  
  