diff --git a/build.sh b/build.sh
index 5c3a95f..d71ed15 100755
--- a/build.sh
+++ b/build.sh
@@ -11,7 +11,7 @@ IMAGE="${IMAGE_REPO:-localhost/opencode-dev}"
 
 usage() {
   echo 'Usage: $0 [--no-cache] [--update] [--dry-run] [--remove] [--prune] [--apt-packages="pack1 pack2"]'
-  exit 0
+  exit 2
 }
 
 BUILD_OPTS=()