anchor.diff:  { stdenv
  -, autoconf
  -, autoconf-archive
  -, automake
   , fetchFromGitHub
   , gettext
   , intltool
   , lib
  -, libtool
   , makeWrapper
  -, pkgconfig
  +, meson
  +, ninja
  +, python3
   
   , adwaita-icon-theme
   , appstream-glib
  
positive.code:   inherit (lib)
      boolEn;
  
    version = "2017-08-10";
  in
  stdenv.mkDerivation rec {
    name = "gnome-mpv-${version}";
  
negative.code:     version = 3;
      owner = "gnome-mpv";
      repo = "gnome-mpv";
      rev = "0f3c23f0d752af1eff7dec7ca95143e4b4f1eb97";
      sha256 = "acdf223aad33b507732d5d67838070ddec360d31ce6132a4d5bcd90711310443";
    };
  
    nativeBuildInputs = [
      gettext
      intltool
      makeWrapper
      meson
      ninja
      python3
    ];
  
    buildInputs = [
  