anchor.diff:    };
   
     propagatedBuildInputs = [ numpy scipy ];
  -  buildInputs = [ matplotlib pytest ];
  -  doCheck = false; # errors
  +  checkInputs = [ matplotlib pytest ];
  +  doCheck = !isPy3k;  # https://github.com/marinkaz/nimfa/issues/42
   
     meta = with stdenv.lib; {
       description = "Nonnegative matrix factorization library";
  
positive.code: { stdenv
  , buildPythonPackage
  , fetchPypi
  , numpy
  , scipy
  , matplotlib
  
negative.code: }:
  
  buildPythonPackage rec {
    pname = "nimfa";
    version = "1.3.1";
  
  