anchor.diff: -{ fetchurl, stdenv, pkgconfig, intltool, perl, perlXMLParser, libxml2
  +{ fetchurl, stdenv, pkgconfig, intltool, libxml2
   , glib, gtk3, pango, atk, gdk_pixbuf, shared_mime_info, itstool, gnome3
  -, poppler, ghostscriptX, djvulibre, libspectre, libsecret , wrapGAppsHook
  -, librsvg, gobjectIntrospection
  +, poppler, ghostscriptX, djvulibre, libspectre, libsecret, wrapGAppsHook
  +, librsvg, gobjectIntrospection, yelp_tools
   , recentListSize ? null # 5 is not enough, allow passing a different number
   , supportXPS ? false    # Open XML Paper Specification via libgxps
  -, fetchpatch, autoreconfHook
  +, autoreconfHook
   }:
   
   stdenv.mkDerivation rec {
     inherit (import ./src.nix fetchurl) name src;
   
  -  # missing help for now; fixing the autogen phase seemed too difficult
  -  postPatch = "sed '/@YELP_HELP_RULES@/d' -i help/Makefile.am";
  -
  -  nativeBuildInputs = [ pkgconfig wrapGAppsHook autoreconfHook/*for patches*/ ];
  +  nativeBuildInputs = [
  +    pkgconfig gobjectIntrospection intltool itstool wrapGAppsHook yelp_tools autoreconfHook
  +  ];
   
     buildInputs = [
  -    intltool perl perlXMLParser libxml2
  -    glib gtk3 pango atk gdk_pixbuf gobjectIntrospection
  -    itstool gnome3.adwaita-icon-theme
  +    glib gtk3 pango atk gdk_pixbuf libxml2
       gnome3.libgnome_keyring gnome3.gsettings_desktop_schemas
       poppler ghostscriptX djvulibre libspectre
  -    libsecret librsvg gnome3.adwaita-icon-theme gnome3.dconf
  +    libsecret librsvg gnome3.adwaita-icon-theme
     ] ++ stdenv.lib.optional supportXPS gnome3.libgxps;
   
     configureFlags = [
  -    "--disable-nautilus" # Do not use nautilus
  +    "--disable-nautilus" # Do not build nautilus plugin
       "--enable-introspection"
       (if supportXPS then "--enable-xps" else "--disable-xps")
     ];
   
     NIX_CFLAGS_COMPILE = "-I${gnome3.glib.dev}/include/gio-unix-2.0";
   
  -  preConfigure = with stdenv.lib;
  -    optionalString doCheck ''
  -      for file in test/*.py; do
  -        echo "patching $file"
  -        sed '1s,/usr,${python},' -i "$file"
  -      done
  -    '' + optionalString (recentListSize != null) ''
  -      sed -i 's/\(gtk_recent_chooser_set_limit .*\)5)/\1${builtins.toString recentListSize})/' shell/ev-open-recent-action.c
  -      sed -i 's/\(if (++n_items == \)5\(.*\)/\1${builtins.toString recentListSize}\2/' shell/ev-window.c
  -    '';
  +  preConfigure = stdenv.lib.optionalString (recentListSize != null) ''
  +    sed -i 's/\(gtk_recent_chooser_set_limit .*\)5)/\1${builtins.toString recentListSize})/' shell/ev-open-recent-action.c
  +    sed -i 's/\(if (++n_items == \)5\(.*\)/\1${builtins.toString recentListSize}\2/' shell/ev-window.c
  +  '';
   
     preFixup = ''
       gappsWrapperArgs+=(--prefix XDG_DATA_DIRS : "${shared_mime_info}/share")
  
positive.code: 
      license = stdenv.lib.licenses.gpl2Plus;
      platforms = platforms.linux;
      maintainers = [ maintainers.vcunat ];
    };
  }
  
negative.code: 
    enableParallelBuilding = true;
  
    meta = with stdenv.lib; {
      homepage = https://wiki.gnome.org/Apps/Evince;
      description = "GNOME's document viewer";
  
      longDescription = ''
  