diff --git a/install.sh b/install.sh
index 2c0c0554..88c76798 100755
--- a/install.sh
+++ b/install.sh
@@ -6,7 +6,7 @@
 
 set -euo pipefail
 
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]:-$0}")" && pwd)"
 DEFAULT_NEMOCLAW_VERSION="0.1.0"
 TOTAL_STEPS=3