diff --git a/pkgs/applications/editors/vscode/extensions/vscodeEnv.nix b/pkgs/applications/editors/vscode/extensions/vscodeEnv.nix
index 818cca51772a..3ad90604c9be 100644
--- a/pkgs/applications/editors/vscode/extensions/vscodeEnv.nix
+++ b/pkgs/applications/editors/vscode/extensions/vscodeEnv.nix
@@ -25,7 +25,7 @@
 }:
 let
   mutableExtensionsFilePath = toString mutableExtensionsFile;
-  mutableExtensions = lib.optionals builtins.pathExists mutableExtensionsFile (import mutableExtensionsFilePath);
+  mutableExtensions = lib.optionals (builtins.pathExists mutableExtensionsFile) (import mutableExtensionsFilePath);
   vscodeWithConfiguration = import ./vscodeWithConfiguration.nix {
     inherit lib writeShellScriptBin extensionsFromVscodeMarketplace;
     vscodeDefault = vscode;