woot. got a working build again

modules/nixos/system/security/sops/default.nix

@@ -0,0 +1,22 @@
+{ pkgs, config, namespace, inputs, ... }:
+let
+  cfg = config.${namespace}.system.security.sops;
+in
+{
+  imports = [
+    inputs.sops-nix.nixosModules.sops
+  ];
+
+  options.${namespace}.system.security.sops = {};
+
+  config = {
+    environment.systemPackages = with pkgs; [ sops ];
+
+    sops = {
+      defaultSopsFile = ../../../../secrets/secrets.yaml;
+      defaultSopsFormat = "yaml";
+
+      age.keyFile = "/home/";
+    };
+  };
+}