diff --git a/scripts/prepareSounds.mjs b/scripts/prepareSounds.mjs
index f80ace4e..7ff614a2 100644
--- a/scripts/prepareSounds.mjs
+++ b/scripts/prepareSounds.mjs
@@ -246,6 +246,7 @@ const writeSoundsMap = async () => {
 const makeSoundsBundle = async () => {
   const allSoundsMap = JSON.parse(fs.readFileSync('./generated/sounds.json', 'utf8'))
   const allSoundsVersionedMap = JSON.parse(fs.readFileSync('./generated/soundsPathVersionsRemap.json', 'utf8'))
+  if (!process.env.REPO_SLUG) throw new Error('REPO_SLUG is not set')
 
   const allSoundsMeta = {
     format: 'mp3',