anchor.diff: -{ stdenv, fetchurl, vala, meson, ninja
  +{ stdenv, fetchurl, vala, meson, ninja, libpwquality
   , pkgconfig, gtk3, glib, gobject-introspection
   , wrapGAppsHook, itstool, gnupg, libsoup
   , gnome3, gpgme, python3, openldap, gcr
  
positive.code:     gnome3.gsettings-desktop-schemas gnupg
      gnome3.adwaita-icon-theme gpgme
      libsecret avahi libsoup p11-kit
      openssh openldap
    ];
  
    postPatch = ''
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "seahorse";
    version = "3.32";
  
    src = fetchurl {
      url = "mirror://gnome/sources/${pname}/${stdenv.lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
      sha256 = "1wxcxq6ahlwab8dr83gqml67y95mnk56hsgw19d4h0xjvyz2ym52";
    };
  
    doCheck = true;
  