Revert "use deploy's overlay to prevent nixpkgs dep"

This reverts commit 8ae19a33c1c34620ce843e286fa69852db791d5c.

fix: #75

see that issue also for an unresolvable situation induced by this

flake.nix

@@ -4,13 +4,17 @@
   inputs =
     {
       nixpkgs.url = "github:nixos/nixpkgs";
+      deploy = {
+        url = "github:serokell/deploy-rs";
+        inputs = {
+          nixpkgs.follows = "nixpkgs";
+          utils.follows = "utils";
+        };
+      };
       devshell.url = "github:numtide/devshell";
       utils.url = "github:gytis-ivaskevicius/flake-utils-plus/staging";
       nixlib.url = "github:divnix/nixpkgs.lib";
 
-      # Only overlay is used, so nixpkgs isn't a cost here
-      deploy.url = "github:serokell/deploy-rs";
-
       # We only use the nixosModules output which only needs nixpkgs lib
       # TODO: don't pull another 'nixpkgs' when only nixpkgs lib is needed
       nixos-generators = {

src/generators.nix

@@ -21,20 +21,16 @@
       **/
 
     lib.mapAttrs
-      (_: config:
-        let
-          pkgs = config.pkgs.appendOverlays [ deploy.overlay ];
-        in
-        lib.recursiveUpdate
-          {
-            hostname = config.config.networking.hostName;
+      (_: config: lib.recursiveUpdate
+        {
+          hostname = config.config.networking.hostName;
 
-            profiles.system = {
-              user = "root";
-              path = pkgs.deploy-rs.lib.activate.nixos config;
-            };
-          }
-          extraConfig)
+          profiles.system = {
+            user = "root";
+            path = deploy.lib.${config.config.nixpkgs.system}.activate.nixos config;
+          };
+        }
+        extraConfig)
       hosts;
 
   # DEPRECATED, suites no longer needs an explicit function after the importables generalization
@@ -46,5 +42,5 @@
         value = lib.mkProfileAttrs (toString path);
       });
     in
-    lib.mapAttrs (_: v: lib.profileMap v) (suites profileSet);
+      lib.mapAttrs (_: v: lib.profileMap v) (suites profileSet);
 }