diff --git a/pkgs/applications/networking/browsers/firefox/wrapper.nix b/pkgs/applications/networking/browsers/firefox/wrapper.nix
index 82996d28429a..149a3f13e54d 100644
--- a/pkgs/applications/networking/browsers/firefox/wrapper.nix
+++ b/pkgs/applications/networking/browsers/firefox/wrapper.nix
@@ -413,7 +413,7 @@ let
           done
 
           # Disable update checks
-          touch $out/${libDir}/is-packaged-app
+          touch "$out/${libDir}/is-packaged-app"
 
           cd "$out"