anchor.diff:  { stdenv
   , autoreconfHook
   , fetchurl
  -, fetchpatch
   , gettext
   , glib
   , gnome-bluetooth
  
positive.code: 
  let
    pname = "gnome-flashback";
    version = "3.36.0";
  
    # From data/sessions/Makefile.am
    requiredComponentsCommon = [
  
negative.code: 
      src = fetchurl {
        url = "mirror://gnome/sources/${pname}/${stdenv.lib.versions.majorMinor version}/${name}.tar.xz";
        sha256 = "16gknn5mj29i8svlncarj92qi0swdlziggxpg9rryqslsy896a2x";
      };
  
      # make .desktop Execs absolute
      postPatch = ''
  