anchor.diff:        mpi4py
         future
         scikit-fmm
  +      openssh
       ] ++ lib.optionals isPy27 [ pysparse ] ++ not_darwin_inputs;
   
       checkInputs = not_darwin_inputs;
   
       checkPhase = ''
  +      export OMPI_MCA_plm_rsh_agent=${openssh}/bin/ssh
         ${python.interpreter} setup.py test --modules
       '';
   
  
positive.code: in
    buildPythonPackage rec {
      pname = "fipy";
      version = "3.3";
  
      src = fetchPypi {
        pname = "FiPy";
        inherit version;
        sha256 = "11agpg3d6yrns8igkpml1mxy3mkqkjq2yrw1mw12y07dkk12ii19";
      };
  
      propagatedBuildInputs = [
  
negative.code: , gmsh
  , python
  , stdenv
  , openssh
  , fetchurl
  }:
  
  let
  