anchor.diff:    };
   
     nativeBuildInputs = [
  -    intltool pkgconfig scons swig wrapGAppsHook
  +    intltool
  +    pkgconfig
  +    scons
  +    swig
  +    wrapGAppsHook
       gobject-introspection # for setup hook
     ];
   
     buildInputs = [
  -    gtk3 gdk-pixbuf json_c lcms2 libpng librsvg pycairo pygobject3 python
  +    gtk3
  +    gdk-pixbuf
  +    json_c
  +    lcms2
  +    libpng
  +    librsvg
  +    pycairo
  +    pygobject3
  +    python2
     ];
   
  -  propagatedBuildInputs = [ numpy ];
  +  propagatedBuildInputs = [
  +    numpy
  +  ];
   
     postInstall = ''
       sed -i -e 's|/usr/bin/env python2.7|${python}/bin/python|' $out/bin/mypaint
  
positive.code: 
    meta = with stdenv.lib; {
      description = "A graphics application for digital painters";
      homepage = http://mypaint.org/;
      license = licenses.gpl2Plus;
      platforms = platforms.linux;
      maintainers = with maintainers; [ goibhniu jtojnar ];
  
negative.code: { stdenv
  , fetchFromGitHub
  , gtk3
  , intltool
  , json_c
  , lcms2
  , libpng
  , librsvg
  , gobject-introspection
  , gdk-pixbuf
  , pkgconfig
  , python2
  , scons
  , swig
  , wrapGAppsHook
  }:
  
  let
    inherit (python2.pkgs) pycairo pygobject3 numpy;
  in stdenv.mkDerivation {
    pname = "mypaint";
    version = "1.2.1";
  