anchor.diff:      sha256 = "1rd3vlaqkg16iz6qcw6rkbq0jmyvc0843wa3brnvn1nz0kla243f";
     };
   
  -  buildInputs = [tk];
  +  propagatedBuildInputs = with pythonPackages; [
  +    markdown
  +    tkinter
  +    docutils
  +  ];
   
  -  propagatedBuildInputs = [
  -    pythonPackages.markdown
  -    pythonPackages.tkinter
  -    pythonPackages.docutils
  -  ];
  +  # No tests
  +  doCheck = false;
   
     postInstall = ''
       install -dm755 "$out/share/licenses/nvpy/"
  
positive.code: { pkgs, fetchurl, tk, pythonPackages }:
  
  pythonPackages.buildPythonApplication rec {
    version = "0.9.7";
    name = "nvpy-${version}";
  
  
negative.code: 
      install -dm755 "$out/share/doc/nvpy/"
      install -m644 README.rst "$out/share/doc/nvpy/README"
    '';
  
    meta = with pkgs.lib; {
  