anchor.diff:  
   stdenv.mkDerivation rec {
     name = "evince-${version}";
  -  versionMajor = "3.18";
  -  versionMinor = "2";
  +  versionMajor = "3.20";
  +  versionMinor = "0";
     version = "${versionMajor}.${versionMinor}";
   
     src = fetchurl {
       url = "mirror://gnome/sources/evince/${versionMajor}/${name}.tar.xz";
  -    sha256 = "05ybiqniqbn1nr4arksvc11bkb37z17shvhkmgnak0fqairnrba2";
  +    sha256 = "cf8358a453686c2a7f85d245f83fe918c0ce02eb6532339f3e02e31249a5a280";
     };
   
     nativeBuildInputs = [
       gettext
       intltool
       itstool
  +    makeWrapper
       perl
       perlPackages.XMLParser
     ];
  
positive.code:     gst-plugins-good
      gstreamer
      gtk3
      libgxps
      libsecret
      libspectre
  
negative.code:     adwaita-icon-theme
      atk
      cairo
      dconf
      djvulibre
      gdk-pixbuf
      glib
  