Finally switch to flakes.

flake.nix

@@ -0,0 +1,88 @@
+{
+  description = "Jimbo's Nix Flake";
+
+  inputs = {
+    # Nixpkgs
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.05";
+    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
+    nur.url = "github:nix-community/NUR";
+    mail.url = "gitlab:simple-nixos-mailserver/nixos-mailserver";
+    nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-24.05";
+
+    # NixOS utils
+    hardware.url = "github:nixos/nixos-hardware/master";
+    disko = {
+      url = "github:nix-community/disko";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    # Home manager
+    home-manager = {
+      url = "github:nix-community/home-manager/release-24.05";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = {
+    self, 
+    nixpkgs, 
+    home-manager,
+    nur,
+    nixos-mailserver,
+    ...
+  } @inputs: let
+    inherit (self) outputs;
+    forAllSystems = nixpkgs.lib.genAttrs [
+      "aarch64-linux"
+      "x86_64-linux"
+    ];
+  in rec {
+    # Your custom packages
+    # Accessible through 'nix build', 'nix shell', etc
+    packages = forAllSystems (system: import ./pkgs nixpkgs.legacyPackages.${system});
+
+    # Formatter for your nix files, available through 'nix fmt'
+    # Other options beside 'alejandra' include 'nixpkgs-fmt'
+    formatter = forAllSystems (system: nixpkgs.legacyPackages.${system}.alejandra);
+
+    # Your custom packages and modifications, exported as overlays
+    overlays = import ./overlays {inherit inputs;};
+
+    # NixOS configuration entrypoint, use 'nixos-rebuild --flake .#your-hostname'
+    nixosConfigurations = {
+      JimNixDesktop = nixpkgs.lib.nixosSystem {
+        specialArgs = {inherit inputs outputs;};
+        modules = [
+          ./nixos/desktop.nix
+        ];
+      };
+      JimNixServer = nixpkgs.lib.nixosSystem {
+        specialArgs = {inherit inputs outputs;};
+        modules = [
+          ./nixos/server.nix
+	  nixos-mailserver.nixosModule
+        ];
+      };
+    };
+
+    # Standalone home-manager configuration entrypoint
+    # Available through 'home-manager --flake .#your-username@your-hostname'
+    homeConfigurations = {
+      "jimbo@JimNixDesktop" = home-manager.lib.homeManagerConfiguration {
+        pkgs = nixpkgs.legacyPackages.x86_64-linux;
+        extraSpecialArgs = {inherit inputs outputs;};
+        modules = [
+          ./home-manager/jimbo_desktop.nix
+	  nur.nixosModules.nur
+        ];
+      };
+      "jimbo@JimNixServer" = home-manager.lib.homeManagerConfiguration {
+        pkgs = nixpkgs.legacyPackages.x86_64-linux;
+        extraSpecialArgs = {inherit inputs outputs;};
+        modules = [
+          ./home-manager/jimbo_server.nix
+        ];
+      };
+    };
+  };
+}