adding e11sync module

flake.nix

@@ -77,6 +77,9 @@
         '';
       };
 
+      nixosModules.e11sync = import ./modules/e11sync;
+      nixosModules.default = self.nixosModules.e11sync;
+
       apps = {
         e11sync-frontend = {
           type = "app";

modules/e11sync/default.nix

@@ -0,0 +1,14 @@
+{
+  config,
+  lib,
+  e11sync-backend,
+}: {
+  options.e11sync = with lib.types; {
+    enable = lib.mkEnableOption "Enable e11sync";
+    secretKeyPath = lib.mkOption {type = path;};
+  };
+
+  config = lib.mkIf config.e11sync.enable {
+    environment.systemPackages = [e11sync-backend];
+  };
+}