diff --git a/pkgs/applications/networking/browsers/firefox/wrapper.nix b/pkgs/applications/networking/browsers/firefox/wrapper.nix
index 16e74e73529c..8d21829889a5 100644
--- a/pkgs/applications/networking/browsers/firefox/wrapper.nix
+++ b/pkgs/applications/networking/browsers/firefox/wrapper.nix
@@ -396,7 +396,7 @@ let
           done
 
           # Disable update checks
-          touch $out/${libDir}/is-packaged-app
+          touch "$out/${libDir}/is-packaged-app"
 
           cd "$out"