diff --git a/.install/bin/pdm-shell b/.install/bin/pdm-shell
index 0cd3c78..2a5ed08 100755
--- a/.install/bin/pdm-shell
+++ b/.install/bin/pdm-shell
@@ -41,7 +41,7 @@ if [[ $# -gt 2 ]]; then
 fi
 
 # Main
-if [[ -z $2 ]]; then
+if [[ $# -eq 1 ]]; then
         podman exec -it "$container" bash -l
 else
         podman exec -it "$container" bash -c "${@:2}"