diff --git a/nixos/modules/services/x11/xserver.nix b/nixos/modules/services/x11/xserver.nix
index fcc18c9a26f..c0051a2ce38 100644
--- a/nixos/modules/services/x11/xserver.nix
+++ b/nixos/modules/services/x11/xserver.nix
@@ -121,7 +121,7 @@ let
           fi
         done
 
-        for i in $(find ${toString cfg.modules} -type d); do
+        for i in $(find ${toString cfg.modules} -type d | sort); do
           if test $(echo $i/*.so* | wc -w) -ne 0; then
             echo "  ModulePath \"$i\"" >> $out
           fi