anchor.diff:      done
     '';
   
  -  preConfigure=
  -    # These files are not executable upstream, so we need to
  -    # make them executable for `patchShebangs` to pick them up.
  -    # Can be removed when this is merged and available:
  -    #     https://gitlab.freedesktop.org/gstreamer/gstreamer/merge_requests/141
  -    ''
  -      chmod +x gst/parse/get_flex_version.py
  -    '' +
  -    ''
  -      patchShebangs .
  -    '';
  -
     preFixup = ''
       moveToOutput "share/bash-completion" "$dev"
     '';
   
     setupHook = ./setup-hook.sh;
  +
  +  meta = with lib ;{
  +    description = "Open source multimedia framework";
  +    homepage = "https://gstreamer.freedesktop.org";
  +    license = licenses.lgpl2Plus;
  +    platforms = platforms.unix;
  +    maintainers = with maintainers; [ ttuegel matthewbauer ];
  +  };
   }
  
positive.code: { stdenv, fetchurl, fetchpatch, meson, ninja
  , pkgconfig, gettext, gobject-introspection
  , bison, flex, python3, glib, makeWrapper
  , libcap,libunwind, darwin
  , elfutils # for libdw
  , bash-completion
  , docbook_xsl, docbook_xml_dtd_412
  , gtk-doc
  , lib
  , CoreServices
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "gstreamer";
    version = "1.16.1";
  
    outputs = [ "out" "dev" "devdoc" ];
    outputBin = "dev";
  
    src = fetchurl {
      url = "${meta.homepage}/src/${pname}/${pname}-${version}.tar.xz";
      sha256 = "0z9pyhf6zm1r0spw6zym80bvbyx6h8xg9h6535csbnn48ws1q882";
    };
  
    patches = [
      ./fix_pkgconfig_includedir.patch
    ];
  
    nativeBuildInputs = [
      meson
      ninja
      pkgconfig
      gettext
      bison
      flex
      python3
      makeWrapper
      gobject-introspection
      bash-completion
  
      # documentation
      gtk-doc
      docbook_xsl
      docbook_xml_dtd_43
    ];
  
    buildInputs = lib.optionals stdenv.isLinux [
      libcap
      libunwind
      elfutils
    ] ++ lib.optionals stdenv.isDarwin [
      CoreServices
    ];
  
    propagatedBuildInputs = [
      glib
    ];
  
    mesonFlags = [
      "-Ddbghelp=disabled" # not needed as we already provide libunwind and libdw, and dbghelp is a fallback to those
      "-Dexamples=disabled" # requires many dependencies and probably not useful for our users
    ] ++ lib.optionals stdenv.isDarwin [
      # darwin.libunwind doesn't have pkgconfig definitions so meson doesn't detect it.
      "-Dlibunwind=disabled"
      "-Dlibdw=disabled"
    ];
  
    postPatch = ''
      patchShebangs \
        gst/parse/get_flex_version.py \
        gst/parse/gen_grammar.py.in \
        gst/parse/gen_lex.py.in \
        libs/gst/helpers/ptp_helper_post_install.sh
    '';
  
    postInstall = ''
      for prog in "$dev/bin/"*; do
  