diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index eb2eec9659e..b4c19b0bec9 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3404,7 +3404,7 @@ rec {
       expat pkgconfig freetype fontconfig libwpd libxml2
       db4 sablotron curl libsndfile flex zip unzip libmspack
       getopt file neon cairo which icu boost jre jdk ant hsqldb;
-    inherit (xlibs) libXaw;
+    inherit (xlibs) libXaw libXext;
     inherit (gtkLibs) gtk;
     bison = bison23;
   };