fix: share pkgs & overlays with home-manager

overlays/flake-module.nix

@@ -0,0 +1,27 @@
+{ self, inputs, ... }:
+
+{
+  flake = {
+    overlays.default = final: prev: {
+      unstable = import inputs.nixpkgs-unstable {
+        inherit (prev) system;
+        config.allowUnfree = true;
+      };
+      inherit (inputs.self.packages.${prev.system}) deconz brlaser;
+      vimPlugins = prev.vimPlugins // final.callPackage ../pkgs/vim-plugins { inherit inputs; };
+    };
+    pkgsFor =
+      system:
+      import inputs.nixpkgs {
+        inherit system;
+        overlays = [ self.overlays.default ];
+        config.allowUnfree = true;
+      };
+  };
+
+  perSystem =
+    { system, ... }:
+    {
+      _module.args.pkgs = self.pkgsFor system;
+    };
+}