diff --git a/modules/services/x11/display-managers/default.nix b/modules/services/x11/display-managers/default.nix
index 42b5ce4aac5c..cf4bbedfa272 100644
--- a/modules/services/x11/display-managers/default.nix
+++ b/modules/services/x11/display-managers/default.nix
@@ -23,7 +23,7 @@ let
 
     # To admit zero-length 'paths'
     postBuild = "
-      ensureDir $out/lib/dri
+      mkdir -p $out/lib/dri
     ";
   };