diff --git a/pkgs/desktops/gnustep/back/default.nix b/pkgs/desktops/gnustep/back/default.nix
index 8e11a2862841..6678b11df023 100644
--- a/pkgs/desktops/gnustep/back/default.nix
+++ b/pkgs/desktops/gnustep/back/default.nix
@@ -5,6 +5,7 @@
 , x11
 , freetype
 , pkgconfig
+, libXmu
 }:
 let
   version = "0.25.0";
@@ -15,7 +16,7 @@ gsmakeDerivation {
     url = "ftp://ftp.gnustep.org/pub/gnustep/core/gnustep-back-${version}.tar.gz";
     sha256 = "14gs1b32ahnihd7mwpjrws2b8hl11rl1wl24a7651d3z2l7f6xj2";
   };
-  buildInputs = [ cairo base gui freetype pkgconfig x11 ];
+  buildInputs = [ cairo base gui freetype pkgconfig x11 libXmu ];
   meta = {
     description = "A generic backend for GNUstep";
   };
diff --git a/pkgs/desktops/gnustep/gworkspace/default.nix b/pkgs/desktops/gnustep/gworkspace/default.nix
index 67fffd10a0f4..210b72292fd6 100644
--- a/pkgs/desktops/gnustep/gworkspace/default.nix
+++ b/pkgs/desktops/gnustep/gworkspace/default.nix
@@ -4,13 +4,13 @@
 , system_preferences
 }:
 let
-  version = "0.9.3";
+  version = "0.9.4";
 in
 gsmakeDerivation {
   name = "gworkspace-${version}";
   src = fetchurl {
     url = "ftp://ftp.gnustep.org/pub/gnustep/usr-apps/gworkspace-${version}.tar.gz";
-    sha256 = "0jchqwb0dj522j98jqlqlib44jppax39zx2zqyzdwiz4qjl470r3";
+    sha256 = "0cjn83m7qmbwdpldlyhs239nwswgip3yaz01ahls130dq5qq7hgk";
   };
   # additional dependencies:
   # - PDFKit framework from http://gap.nongnu.org/