anchor.diff:        broken = true;
       };
     };
  -
  +  
     mock = buildPythonPackage (rec {
       name = "mock-2.0.0";
   
  
positive.code:       license = licenses.free;
      };
    } else null;
  
    funcsigs = buildPythonPackage rec {
      name = "funcsigs-1.0.2";
  
  
negative.code: 
    tensorflowNoGpuSupport = buildPythonPackage rec {
      name = "tensorflow";
      version = "0.10.0";
      format = "wheel";
  
      src = pkgs.fetchurl {
        url = if stdenv.isDarwin then
          "https://storage.googleapis.com/tensorflow/mac/cpu/tensorflow-${version}-py2-none-any.whl" else
          "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-${version}-cp27-none-linux_x86_64.whl";
        sha256 = if stdenv.isDarwin then
          "1gjybh3j3rn34bzhsxsfdbqgsr4jh50qyx2wqywvcb24fkvy40j9" else
          "15v7iyry8bmp5wcc1rr4bkp80f3887rl99zqf8pys5bad4gldbkh";
      };
  
      propagatedBuildInputs = with self; [ numpy six protobuf3_0_0b2 pkgs.swig mock];
  
      preFixup = ''
        RPATH="${stdenv.lib.makeLibraryPath [ pkgs.gcc.cc.lib pkgs.zlib ]}"
  