anchor.diff:  
     NIX_LDFLAGS = "-lX11";
   
  -  meta = {
  +  meta = with stdenv.lib; {
       license = "GPL";
       homepage = http://www.inkscape.org;
  +    description = "Vector graphics editor";
  +    platforms = platforms.all;
       longDescription = ''
         Inkscape is a feature-rich vector graphics editor that edits
         files in the W3C SVG (Scalable Vector Graphics) file format.
  
positive.code: 
    configureFlags = "--with-python";
  
    postInstall = ''
      # Make sure PyXML modules can be found at run-time.
      for i in "$out/bin/"*
  
negative.code: 
    patches = [ ./configure-python-libs.patch ];
  
    postPatch = stdenv.lib.optionalString doCheck
      ''sed -i 's:#include "../../src:#include "src:' src/cxxtests.cpp'';
  
    propagatedBuildInputs = [
      # Python is used at run-time to execute scripts, e.g., those from
      # the "Effects" menu.
  