diff --git a/src/build.sh b/src/build.sh
index d3214058..0b033f25 100644
--- a/src/build.sh
+++ b/src/build.sh
@@ -290,8 +290,11 @@ function build_source {
     local exit_code=0
     if [ -f "${PKG_FOLDERS[$idx]}/package.xml" ]; then
       build_pkg "${PKG_NAMES[$idx]}" "${PKG_FOLDERS[$idx]}" || exit_code=$?
-    else
+    elif [ -f "${PKG_FOLDERS[$idx]}/setup.py" ]; then
       build_python_pkg "${PKG_NAMES[$idx]}" "${PKG_FOLDERS[$idx]}" || exit_code=$?
+    else
+      ici_warning "No package.xml or setup.py found"
+      exit_code=0
     fi
 
     if [ "$exit_code" != 0 ] ; then