diff --git a/cd-build-project b/cd-build-project
index b8e5ffd..8a5035b 100755
--- a/cd-build-project
+++ b/cd-build-project
@@ -1,3 +1,7 @@
-./build.py \
-|| \
-./build.sh
+if [ -x './build.py' ] ; then
+    ./build.py
+elif [ -x './build.sh' ] ; then
+    ./build.sh
+else
+    exit
+fi