diff --git a/nix/configuration/roles/sway/default.nix b/nix/configuration/roles/sway/default.nix
index 25d05a17..7001b1e8 100644
--- a/nix/configuration/roles/sway/default.nix
+++ b/nix/configuration/roles/sway/default.nix
@@ -248,7 +248,7 @@ let
     # Allow mako to show notifications again.
     set -euo pipefail
     IFS=$'\n\t'
-    DIR="$( cd "$( dirname "''${BASH_SOURCE [ 0 ]}" )" && pwd )"
+    DIR="$( cd "$( dirname "''${BASH_SOURCE[0]}" )" && pwd )"
 
     ${pkgs.mako}/bin/makoctl mode -s default