anchor.diff:      sha256 = "8b3e4092ba3d541c7a2f9b7d0d9c0275b21c6a01c53a61c731eba6686939d0a5";
     };
   
  +  # Backport of Python 3.5 "collections.abc"
  +  disabled = pythonAtLeast "3.5";
     doCheck = true;
   
     meta = with stdenv.lib; {
  
positive.code: { stdenv
  , buildPythonPackage
  , fetchPyPi
  }:
  
  buildPythonPackage rec {
    name = "backports_abc-${version}";
  
negative.code:     platforms = with platforms;
        x86_64-linux;
    };
  }
  