diff --git a/antp.sh b/antp.sh
index 0c40749..ebc2ddb 100755
--- a/antp.sh
+++ b/antp.sh
@@ -1,9 +1,11 @@
 #!/bin/sh -e
 
-readonly this=$(readlink -f -- "$0")
-readonly dir=$(dirname -- "$this")
 readonly module=antp
 
-cd -- "$dir" || exit
+if ! [ -d "$module" ]; then
+	readonly this=$(readlink -f -- "$0")
+	readonly dir=$(dirname -- "$this")
+	cd -- "$dir" || exit 1
+fi
 
 python3 -m "$module" "$@"