diff --git a/pkgs/desktops/gnome-3/misc/gitg/default.nix b/pkgs/desktops/gnome-3/misc/gitg/default.nix
index 314539b7f9e..32da3a9a4b8 100644
--- a/pkgs/desktops/gnome-3/misc/gitg/default.nix
+++ b/pkgs/desktops/gnome-3/misc/gitg/default.nix
@@ -3,37 +3,49 @@
 , gnome3, gtkspell3, shared-mime-info, libgee, libgit2-glib, librsvg, libsecret
 , libsoup }:
 
-stdenv.mkDerivation rec {
-  name = "gitg-${version}";
+let
+  pname = "gitg";
   version = "3.26.0";
+in stdenv.mkDerivation rec {
+  name = "${pname}-${version}";
 
   src = fetchurl {
-    url = "mirror://gnome/sources/gitg/${gnome3.versionBranch version}/${name}.tar.xz";
+    url = "mirror://gnome/sources/${pname}/${gnome3.versionBranch version}/${name}.tar.xz";
     sha256 = "26730d437d6a30d6e341b9e8da99d2134dce4b96022c195609f45062f82b54d5";
   };
 
-  passthru = {
-    updateScript = gnome3.updateScript { packageName = "gitg"; };
-  };
-
   preCheck = ''
     substituteInPlace tests/libgitg/test-commit.c --replace "/bin/bash" "${bash}/bin/bash"
   '';
   doCheck = true;
 
+  enableParallelBuilding = true;
+
   makeFlags = "INTROSPECTION_GIRDIR=$(out)/share/gir-1.0/ INTROSPECTION_TYPELIBDIR=$(out)/lib/girepository-1.0";
 
-  propagatedUserEnvPkgs = [ shared-mime-info
-                            gnome3.gnome-themes-standard ];
-
-  buildInputs = [ gtk3 glib json-glib libgee libpeas gnome3.libsoup
-                  libgit2-glib gtkspell3 gnome3.gtksourceview gnome3.gsettings-desktop-schemas
-                  librsvg libsecret gobjectIntrospection gnome3.adwaita-icon-theme ];
+  buildInputs = [
+    gtk3 glib json-glib libgee libpeas gnome3.libsoup
+    libgit2-glib gtkspell3 gnome3.gtksourceview gnome3.gsettings-desktop-schemas
+    libsecret gobjectIntrospection gnome3.adwaita-icon-theme
+  ];
 
   nativeBuildInputs = [ vala wrapGAppsHook intltool pkgconfig ];
 
+  preFixup = ''
+    gappsWrapperArgs+=(
+      # Thumbnailers
+      --prefix XDG_DATA_DIRS : "${shared-mime-info}/share"
+    )
+  '';
+
+  passthru = {
+    updateScript = gnome3.updateScript {
+      packageName = pname;
+    };
+  };
+
   meta = with stdenv.lib; {
-    homepage = https://wiki.gnome.org/action/show/Apps/Gitg;
+    homepage = https://wiki.gnome.org/Apps/Gitg;
     description = "GNOME GUI client to view git repositories";
     maintainers = with maintainers; [ domenkozar ];
     license = licenses.gpl2;