chore: refactor flake layout

Signed-off-by: Lander Van den Bulcke <landervandenbulcke@gmail.com>

flake.lock

@@ -414,6 +414,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1757745802,
+        "narHash": "sha256-hLEO2TPj55KcUFUU1vgtHE9UEIOjRcH/4QbmfHNF820=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "c23193b943c6c689d70ee98ce3128239ed9e32d1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs_2": {
       "locked": {
         "lastModified": 1757810152,
@@ -587,6 +603,7 @@
         "home-manager": "home-manager",
         "nixos-mailserver": "nixos-mailserver",
         "nixpkgs": "nixpkgs_2",
+        "nixpkgs-unstable": "nixpkgs-unstable",
         "nixvim": "nixvim",
         "sops-nix": "sops-nix",
         "tidalcycles": "tidalcycles"

flake.nix

@@ -1,9 +1,10 @@
 {
-  description = "Your new nix config";
+  description = "EscapeAngle's Nix config";
 
   inputs = {
     # Nixpkgs
     nixpkgs.url = "github:nixos/nixpkgs/nixos-25.05";
+    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
 
     # Secrets
     sops-nix = {
@@ -54,8 +55,26 @@
     }@inputs:
     let
       inherit (self) outputs;
+
+      # I only care about linux builds
+      systems = [
+        "aarch64-linux"
+        "x86_64-linux"
+      ];
+
+      forAllSystems = nixpkgs.lib.genAttrs systems;
     in
     {
+      # custom pkgs
+      packages = forAllSystems (system: import ./pkgs nixpkgs.legacyPackages.${system});
+
+      formatter = forAllSystems (system: nixpkgs.legacyPackages.${system}.alejandra);
+
+      overlays = import ./overlays { inherit inputs; };
+
+      nixosModules = import ./modules/nixos;
+      homeManagerModules = import ./modules/home-manager;
+
       nixosConfigurations = {
         # Workstations
         wodan = nixpkgs.lib.nixosSystem {

modules/home-manager/default.nix

@@ -0,0 +1,3 @@
+{
+  # my-module = import ./my-module.nix;
+}

modules/nixos/default.nix

@@ -0,0 +1,3 @@
+{
+  # my-module = import ./my-module.nix
+}

overlays/default.nix

@@ -0,0 +1,20 @@
+{ inputs, ... }:
+{
+  # Import custom packages
+  additions = final: _prev: import ../pkgs final.pkgs;
+
+  # Add modifications here:
+  modifications = final: prev: {
+    # example = prev.example.overrideAttrs (oldAttrs: rec {
+    # ...
+    # });
+  };
+
+  # add nixpkgs unstable (accessible through pkgs.unstable)
+  unstable-packages = final: _prev: {
+    unstable = import inputs.nixpkgs-unstable {
+      system = final.system;
+      config.allowUnfree = true;
+    };
+  };
+}

pkgs/default.nix

@@ -0,0 +1,3 @@
+pkgs: {
+  # example = pkgs.callPackage ./example { };
+}