diff --git a/ci/build/build-release.sh b/ci/build/build-release.sh
index 0d6ab4f5..ba319351 100755
--- a/ci/build/build-release.sh
+++ b/ci/build/build-release.sh
@@ -49,7 +49,7 @@ bundle_code_server() {
   {
     "commit": "$(git rev-parse HEAD)",
     "scripts": {
-      "postinstall": "./postinstall.sh"
+      "postinstall": "sh ./postinstall.sh"
     }
   }
 EOF