anchor.diff:      })
     ];
   
  -  enableParallelBuilding = true;
  +  nativeBuildInputs = [
  +    meson
  +    ninja
  +    pkg-config
  +    gettext
  +    perl
  +    gobject-introspection
  +    vala
  +  ];
  +
  +  buildInputs = [
  +    atk
  +    cairo
  +    glib
  +    pango
  +    fribidi
  +    libxml2
  +  ];
  +
  +  propagatedBuildInputs = [
  +    # Required by gtksourceview-4.0.pc
  +    gtk3
  +    # Used by gtk_source_language_manager_guess_language
  +    shared-mime-info
  +  ];
  +
  +  checkInputs = [
  +    xvfb_run
  +    dbus
  +  ];
   
     doCheck = stdenv.isLinux;
  +
     checkPhase = ''
  +    runHook preCheck
  +
       XDG_DATA_DIRS="$XDG_DATA_DIRS:${shared-mime-info}/share" \
       xvfb-run -s '-screen 0 800x600x24' dbus-run-session \
         --config-file=${dbus.daemon}/share/dbus-1/session.conf \
         meson test --no-rebuild --print-errorlogs
  +
  +    runHook postCheck
     '';
   
     passthru = {
  
positive.code:   };
  
    meta = with lib; {
      homepage = "https://wiki.gnome.org/Projects/GtkSourceView";
      platforms = with platforms; linux ++ darwin;
      license = licenses.lgpl21;
      maintainers = teams.gnome.members;
    };
  }
  
negative.code: { lib
  , stdenv
  , fetchurl
  , fetchpatch
  , meson
  , ninja
  , pkg-config
  , atk
  , cairo
  , glib
  , gtk3
  , pango
  , fribidi
  , vala
  , libxml2
  , perl
  , gettext
  , gnome3
  , gobject-introspection
  , dbus
  , xvfb_run
  , shared-mime-info
  }:
  
  stdenv.mkDerivation rec {
    pname = "gtksourceview";
    version = "4.8.1";
  
    outputs = [ "out" "dev" ];
  
    src = fetchurl {
      url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
      sha256 = "0WPXG1/K+8Wx7sbdhB7b283dOnURzV/c/9hri7/mmsE=";
    };
  
    patches = [
      # By default, the library loads syntaxes from XDG_DATA_DIRS and user directory
      # but not from its own datadr (it assumes it will be in XDG_DATA_DIRS).
      # Since this is not generally true with Nix, let’s add $out/share unconditionally.
      ./4.x-nix_share_path.patch
  
      # fixes intermittent "gtksourceview-gresources.h: no such file" errors
  