diff --git a/flake.nix b/flake.nix
index a739edd4..c9782a07 100644
--- a/flake.nix
+++ b/flake.nix
@@ -256,9 +256,9 @@
                     microvm.nixosModules.microvm
                     {
                       microvm = {
-                        mem = 2048;
+                        mem = nixpkgs.lib.mkForce 2048;
                         hypervisor = nixpkgs.lib.mkForce "qemu";
-                        socket = null;
+                        socket = nixpkgs.lib.mkForce null;
                         shares = [ {
                           tag = "ro-store";
                           source = "/nix/store";