anchor.diff:      buildInputs = [ python pkgs.pkgconfig pkgs.libnotify pkgs.pygobject pkgs.pygtk pkgs.gtkLibs.glib pkgs.gtkLibs.gtk pkgs.dbus_glib ];
   
       postInstall = "cd $out/lib/python*/site-packages && ln -s gtk-*/pynotify .";
  -    
  +
       meta = {
         description = "Python bindings for libnotify";
         homepage = http://www.galago-project.org/;
  
positive.code:     };
  
      buildInputs = [freetype];
      doCheck = false; 
  
      meta = {
        description = "The ReportLab Toolkit. An Open Source Python library for generating PDFs and graphics.";
  
negative.code: 
      buildInputs = [pkgs.gfortran];
      propagatedBuildInputs = [ numpy ];
      doCheck = false;
  
      # TODO: add ATLAS=${pkgs.atlas}
      installCommand = ''
  