diff --git a/run-arion-via-nix b/run-arion-via-nix
index b04cdb3..f652987 100755
--- a/run-arion-via-nix
+++ b/run-arion-via-nix
@@ -3,4 +3,4 @@
 # For manual testing of a hacked arion built via Nix.
 # Works when called from outside the project directory.
 
-exec nix run -f "$(dirname ${BASH_SOURCE[0]})" arion -c arion "$@"
+exec nix run -f "$(dirname ${BASH_SOURCE[0]})" arion "$@"