diff --git a/defaults/user-configuration/fhauser/applications/scripts.nix b/defaults/user-configuration/fhauser/applications/scripts.nix
index f5e207a..fa66149 100644
--- a/defaults/user-configuration/fhauser/applications/scripts.nix
+++ b/defaults/user-configuration/fhauser/applications/scripts.nix
@@ -44,7 +44,7 @@ let
 
     ENV_NAME="$1"
     ENV_FILE="$HOME/shares/cloud.threema.ch/envs/''${ENV_NAME}.nix"
-    COMMAND="$2"
+    COMMAND="''${2-bash}"
 
     if [ -z "$ENV_NAME" ]; then
       echo "Error: No env name provided" >&2