diff --git a/module/sway/default.nix b/module/sway/default.nix
index 7bc6782..62f12ff 100644
--- a/module/sway/default.nix
+++ b/module/sway/default.nix
@@ -1,6 +1,6 @@
 { pkgs, wallpaper, style, util, setting, ... } @args: let
 	mkConfig = { modules }: builtins.foldl' (acc: mod:
-		acc + (import mod args).text
+		acc + util.trimTabs((import mod args).text)
 	) "" modules;
 
 	swayRc = mkConfig {
@@ -27,9 +27,9 @@
 		];
 	};
 in {
-	config = util.trimTabs (''
+	config = (util.trimTabs ''
 		# Read `man 5 sway` for a complete reference.
 		include /etc/sway/config.d/*
-	'' + swayRc);
+	'') + swayRc;
 }
 
diff --git a/part/Util.nix b/part/Util.nix
index b2da388..0a130a6 100644
--- a/part/Util.nix
+++ b/part/Util.nix
@@ -11,9 +11,7 @@
 	ls = path: map (f: "${path}/${f}") (builtins.attrNames (builtins.readDir path));
 
 	# Concat all files by `text` key.
-	catAllText = path: args: trimTabs (
-		(builtins.foldl' (acc: mod:
-			acc + (import mod args).text
-		) "" (ls path))
-	);
+	catAllText = path: args: builtins.foldl' (acc: mod:
+		acc + trimTabs ((import mod args).text)
+	) "" (ls path);
 }