anchor.diff:  
     nativeBuildInputs = [
       gettext
  -    python3
  +    meson
  +    ninja
     ];
   
     buildInputs = [
  -    a52dec
  +    #a52dec  # FIXME
       amrnb
       amrwb
       glib
  
positive.code:     x264
    ];
  
    configureFlags = [
      "--disable-maintainer-mode"
      "--enable-nls"
      "--enable-rpath"
      "--disable-fatal-warnings"
      "--disable-extra-checks"
      "--disable-debug"
      "--disable-profiling"
      "--disable-valgrind"
      "--disable-gcov"
      "--disable-examples"
      "--enable-external"
      "--enable-experimental"
      "--disable-gtk-doc"
      "--disable-gtk-doc-html"
      "--disable-gtk-doc-pdf"
      "--enable-gobject-cast-checks"
      "--disable-glib-asserts"
      "--${boolEn (orc != null)}-orc"
      "--enable-Bsymbolic"
      # Internal plugins
      "--disable-static-plugins"
      "--enable-asfdemux"
      "--enable-dvdlpcmdec"
      "--enable-dvdsub"
      "--enable-xingmux"
      "--enable-realmedia"
      # External plugins
      "--${boolEn (a52dec != null)}-a52dec"
      "--${boolEn (amrnb != null)}-amrnb"
      "--${boolEn (amrnb != null)}-amrwb"
      "--${boolEn (libcdio != null)}-cdio"
      "--${boolEn (libdvdread != null)}-dvdread"
      "--${boolEn (lame != null)}-lame"
      "--${boolEn (libmpeg2 != null)}-mpeg2dec"
      "--${boolEn (mpg123 != null)}-mpg123"
      #"--${boolEn (sidplay != null)}-sidplay"
      /**/"--disable-sidplay"
      #"--${boolEn (twolame != null)}-twolame"
      /**/"--disable-twolame"
      "--${boolEn (x264 != null)}-x264"
    ];
  
    passthru = {
  
negative.code: , fetchurl
  , gettext
  , lib
  , meson
  , ninja
  
  , a52dec
  , amrnb
  