lib: use improved deploy-rs lib with overlay'ed pkg

lib/deploy.nix

@@ -5,17 +5,19 @@
  * Licensed under the MIT license
  */
 
-{ lib, inputs }: let
-  getFqdn = c: let
+{ lib, inputs }:
+let
+  getFqdn =
+    c:
+    let
       net = c.config.networking;
       fqdn =
-      if (net ? domain) && (net.domain != null)
-      then "${net.hostName}.${net.domain}"
-      else net.hostName;
+        if (net ? domain) && (net.domain != null) then "${net.hostName}.${net.domain}" else net.hostName;
     in
     fqdn;
 in {
-  mkDeployNodes = systemConfigurations: extraConfig:
+  mkDeployNodes =
+    systemConfigurations: extraConfig:
     /*
       *
        Synopsis: mkNodes _systemConfigurations_ _extraConfig_
@@ -46,17 +48,32 @@ in {
        ```
       *
     */
-    lib.recursiveUpdate
-    (lib.mapAttrs
-      (
-        _: c: {
+    lib.recursiveUpdate (lib.mapAttrs ( _: c: {
       hostname = getFqdn c;
-          profiles.system = {
-            user = "root";
-            path = inputs.deploy-rs.lib.${c.pkgs.stdenv.hostPlatform.system}.activate.nixos c;
+      profiles.system =
+        let
+          system = c.pkgs.system;
+
+          # Unmodified nixpkgs
+          pkgs = import inputs.nixpkgs { inherit system; };
+
+          # nixpkgs with deploy-rs overlay but force the nixpkgs package
+          deployPkgs = import inputs.nixpkgs {
+            inherit system;
+            overlays = [
+              inputs.deploy-rs.overlays.default
+              (self: super: {
+                deploy-rs = {
+                  inherit (pkgs) deploy-rs;
+                  lib = super.deploy-rs.lib;
                 };
-        }
-      )
-      systemConfigurations)
-    extraConfig;
+              })
+            ];
+          };
+        in
+        {
+          user = "root";
+          path = deployPkgs.deploy-rs.lib.activate.nixos c;
+        };
+    }) systemConfigurations) extraConfig;
 }