diff --git a/ops/nixos/default.nix b/ops/nixos/default.nix
index 28f87f2573..ff2703c494 100644
--- a/ops/nixos/default.nix
+++ b/ops/nixos/default.nix
@@ -66,5 +66,5 @@ in systemDrvs // {
 
   netboot = netbootSystem.config.system.build.pixiecore;
 
-  systemPathJSON = builtins.toFile "systems.json" (builtins.toJSON systemDrvs);
+  systemPathJSON = pkgs.writeText "systems.json" (builtins.toJSON systemDrvs);
 }