anchor.diff:  
     # pmccabe should be a checkInput instead, but configure looks for it
     buildInputs = [
  -    sqlite xapian glib gmime texinfo emacs guile libsoup icu pmccabe
  +    sqlite xapian glib gmime texinfo emacs guile libsoup icu
     ] ++ stdenv.lib.optionals withMug [ gtk3 webkitgtk24x ];
     nativeBuildInputs = [ pkgconfig autoreconfHook ];
  +  checkInputs = [ pmccabe ];
   
     doCheck = true;
   
  
positive.code:     license = licenses.gpl3Plus;
      homepage = "http://www.djcbsoftware.nl/code/mu/";
      platforms = platforms.mesaPlatforms;
      maintainers = with maintainers; [ antono the-kenny ];
    };
  }
  
negative.code: 
    # Install mug and msg2pdf
    postInstall = stdenv.lib.optionalString withMug ''
      for f in msg2pdf mug ; do
        install -m755 toys/$f/$f $out/bin/$f
      done
    '';
  
    meta = with stdenv.lib; {
  