diff --git a/playgrounds/sandbox/run.js b/playgrounds/sandbox/run.js
index 05ac772af0..dffcc0af58 100644
--- a/playgrounds/sandbox/run.js
+++ b/playgrounds/sandbox/run.js
@@ -29,9 +29,7 @@ function mkdirp(dir) {
 const svelte_modules = glob('**/*.svelte', { cwd: `${cwd}/input` });
 const js_modules = glob('**/*.js', { cwd: `${cwd}/input` });
 
-/** @type {Array<'client'|'server'>} */
-const compile_types = ['client', 'server'];
-for (const generate of compile_types) {
+for (const generate of /** @type {const} */ (['client', 'server'])) {
 	console.error(`\n--- generating ${generate} ---\n`);
 	for (const file of svelte_modules) {
 		const input = `${cwd}/input/${file}`;