diff --git a/modules/services/misc/disnix.nix b/modules/services/misc/disnix.nix
index 0773b61c551..f3dd55b64d9 100644
--- a/modules/services/misc/disnix.nix
+++ b/modules/services/misc/disnix.nix
@@ -132,7 +132,7 @@ in
 	        let infrastructureAttrValue = getAttr infrastructureAttrName (cfg.infrastructure);
 		in
 		if builtins.isInt infrastructureAttrValue then
-		''${infrastructureAttrName}=${infrastructureAttrValue} \
+		''${infrastructureAttrName}=${toString infrastructureAttrValue} \
 		''
 		else
                 ''${infrastructureAttrName}=\"${infrastructureAttrValue}\" \