anchor.diff:      pyparsing
       tables
       sympy
  +    meshio
  +    mpi4py
  +    psutil
  +    openssh
     ];
   
     postPatch = ''
  -    # broken test
  -    rm tests/test_homogenization_perfusion.py
  -    rm tests/test_splinebox.py
  +    # broken tests
  +    rm tests/test_meshio.py
   
       # slow tests
       rm tests/test_input_*.py
  
positive.code: , cython
  , python
  , sympy
  }:
  
  buildPythonPackage rec {
    name = "sfepy_${version}";
    version = "2019.4";
  
    src = fetchurl {
      url="https://github.com/sfepy/sfepy/archive/release_${version}.tar.gz";
      sha256 = "1l9vgcw09l6bwhgfzlbn68fzpvns25r6nkd1pcp7hz5165hs6zzn";
    };
  
    propagatedBuildInputs = [
  
negative.code:   '';
  
    checkPhase = ''
      export OMPI_MCA_plm_rsh_agent=${openssh}/bin/ssh
      export HOME=$TMPDIR
      mv sfepy sfepy.hidden
      mkdir -p $HOME/.matplotlib
  