diff --git a/scripts/clean.sh b/scripts/clean.sh
new file mode 100644
index 0000000..aee88eb
--- /dev/null
+++ b/scripts/clean.sh
@@ -0,0 +1,6 @@
+set -e
+
+builddir="${1:-./build}"
+
+echo "[info] cleaning build dir: \"$builddir\""
+rm -r "$builddir"
diff --git a/scripts/start.sh b/scripts/start.sh
index a2df4c0..4e0366f 100644
--- a/scripts/start.sh
+++ b/scripts/start.sh
@@ -20,9 +20,10 @@ function start() {
     exec "$file"
 }
 
-if [[ -f "$file" ]]; then
+if [[ -f $file ]]; then
     start
 else
-    pnpm build
-    start
+    echo "[error] can't start project: no executable found on default directory"
+    echo "[tip] specify the executable path: start \"\$path\""
+    exit 1
 fi