diff --git a/projects/automatic1111/nixos/default.nix b/projects/automatic1111/nixos/default.nix
index 097d5fb..a812fd6 100644
--- a/projects/automatic1111/nixos/default.nix
+++ b/projects/automatic1111/nixos/default.nix
@@ -83,7 +83,7 @@ in
 
     cliArgs = (flatten (mapAttrsToList (n: v:
       if v == null then []
-      else if isBool v then [ "${optionalString v }--${n}" ]
+      else if isBool v then [ "${optionalString v "--"n}" ]
       else if isInt v then [ "--${n}" "${toString v}" ]
       else if isFloat v then [ "--${n}" "${floatToString v}" ]
       else if isString v then ["--${n}" v ]