anchor.diff:  { fetchurl
   , lib, stdenv
   , pkg-config
  +, fetchpatch
   , meson
   , ninja
   , glib
  
positive.code: 
    doCheck = true;
  
    postPatch = ''
      chmod +x meson_post_install.py
      patchShebangs meson_post_install.py
  
negative.code:     url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
      sha256 = "1f9b52vmwnq7s51vj26w2618dn2ph5g12ibbkbyk6fvxcgd7iryn";
    };
  
    patches = [
      # Fix tests with e-d-s linked with libphonenumber support
      # https://gitlab.gnome.org/GNOME/folks/merge_requests/40
      (fetchpatch {
        url = "https://gitlab.gnome.org/GNOME/folks/commit/6d443480a137f6a6ff345b21bf3cb31066eefbcd.patch";
        sha256 = "D/Y2g12TT0qrcH+iJ2umu4Hmp0EJ3Hoedh0H3aWI+HY=";
      })
    ];
  
    mesonFlags = [
      "-Ddocs=true"
  