diff --git a/run_demo.sh b/run_demo.sh
index 9784f23..8ad4a83 100755
--- a/run_demo.sh
+++ b/run_demo.sh
@@ -219,7 +219,7 @@ for src_dir in "$@"; do
   fi
 
   # Python packages
-  if [ -d "${src_dir}/src" ]; then
+  if [ -f "${src_dir}/pyproject.toml" ]; then
     while IFS='' read -r pkg_dir; do
       pkg_name="$(basename "$(dirname "${pkg_dir}")")"