diff --git a/home-manager/home.nix b/home-manager/home.nix
index 1e84441..609880b 100644
--- a/home-manager/home.nix
+++ b/home-manager/home.nix
@@ -21,6 +21,8 @@ let
 	GAPS_IN = "0";
 	GAPS_OUT = "40";
 	GAPS_OUT_INT = builtins.parseInt GAPS_OUT;
+	HALF_GAPS_OUT_INT = GAPS_OUT / 2;
+	HALF_GAPS_OUT = builtins.toString HALF_GAPS_OUT_INT;
 	BORDER_WIDTH = "2";
 	CORNER_RADIUS = "0";
 	WAYBAR_CORNER_RADIUS = "0";
@@ -871,7 +873,7 @@ in
 			global = {
 				width = 300;
 				height = 300;
-				offset = "${builtins.toString (GAPS_OUT_INT / 2)}x${builtins.toString (GAPS_OUT_INT / 2)}";
+				offset = "${HALF_GAPS_OUT}x${HALF_GAPS_OUT}";
 				origin = "${DUNST_ORIGIN}";
 				font = "${FONT}";
 				corner_radius = "${CORNER_RADIUS}";