Set up flakes and nix-darwin

.gitignore

@@ -1 +1,2 @@
 home.nix
+/result

darwin/configuration.nix

@@ -0,0 +1,30 @@
+{ config, pkgs, ... }:
+
+{
+  # List packages installed in system profile. To search by name, run:
+  # $ nix-env -qaP | grep wget
+  environment.systemPackages =
+    [ pkgs.vim
+    ];
+
+  # Use a custom configuration.nix location.
+  # $ darwin-rebuild switch -I darwin-config=$HOME/.config/nixpkgs/darwin/configuration.nix
+  # environment.darwinConfig = "$HOME/.config/nixpkgs/darwin/configuration.nix";
+
+  # Auto upgrade nix package and the daemon service.
+  # services.nix-daemon.enable = true;
+  nix.package = pkgs.nixUnstable;
+
+  # Create /etc/bashrc that loads the nix-darwin environment.
+  programs.zsh.enable = true;  # default shell on catalina
+  # programs.fish.enable = true;
+
+  # Used for backwards compatibility, please read the changelog before changing.
+  # $ darwin-rebuild changelog
+  system.stateVersion = 4;
+
+  users.users.nki = {
+    name = "nki";
+    home = "/Users/nki";
+  };
+}

fish/fish.nix

@@ -1,7 +1,7 @@
-{ config, pkgs, ... }:
+{ config, pkgs, nixpkgs-unstable, ... }:
 
 let
-    pkgsUnstable = import <nixpkgs-unstable> {};
+   pkgsUnstable = import nixpkgs-unstable { system = pkgs.system; };
 in
 {
     programs.fish = {

flake.lock

@@ -0,0 +1,99 @@
+{
+  "nodes": {
+    "darwin": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs-unstable"
+        ]
+      },
+      "locked": {
+        "lastModified": 1634994402,
+        "narHash": "sha256-xmlCVVOYGpZoxgOqsDOVF0B0ASrnbNGVAEzID9qh2xo=",
+        "owner": "lnl7",
+        "repo": "nix-darwin",
+        "rev": "44da835ac40dab5fd231298b59d83487382d2fab",
+        "type": "github"
+      },
+      "original": {
+        "owner": "lnl7",
+        "ref": "master",
+        "repo": "nix-darwin",
+        "type": "github"
+      }
+    },
+    "home-manager": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1635123562,
+        "narHash": "sha256-kYuwQqHXDYxy5ijpm8SvCoPNx0br1TpoWeTIOEwOYvA=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "da8a78eec9f7adb57f9e961d1da64805efacff37",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1635268020,
+        "narHash": "sha256-oaWU7ZvobClXLrQGj7Xvjs2vSlItPFkw/usKh/2c56Y=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "89a27a2e6f54993224f804e50a29e48b8c83d1ca",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1635214691,
+        "narHash": "sha256-65D0Q6fAKzX3ZGlJSTZGj4jbIB7fttZ8FD754AOYeiQ=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "30f73c6493b4877753da54bfafd1aef90f0eebdf",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1622516815,
+        "narHash": "sha256-ZjBd81a6J3TwtlBr3rHsZspYUwT9OdhDk+a/SgSEf7I=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "7e9b0dff974c89e070da1ad85713ff3c20b0ca97",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "21.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "darwin": "darwin",
+        "home-manager": "home-manager",
+        "nixpkgs": "nixpkgs_2",
+        "nixpkgs-unstable": "nixpkgs-unstable"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,31 @@
+{
+  description = "nki's darwin system";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/21.05";
+    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+    darwin.url = "github:lnl7/nix-darwin/master";
+    darwin.inputs.nixpkgs.follows = "nixpkgs-unstable";
+    home-manager.url = "github:nix-community/home-manager";
+  };
+
+  outputs = { self, darwin, nixpkgs, nixpkgs-unstable, home-manager }: {
+    darwinConfigurations."nki-macbook" = darwin.lib.darwinSystem rec {
+      system = "aarch64-darwin";
+      modules = [ 
+        ./darwin/configuration.nix 
+          home-manager.darwinModules.home-manager
+          {
+            home-manager.useGlobalPkgs = true;
+            home-manager.useUserPackages = true;
+	    home-manager.extraSpecialArgs = { inherit nixpkgs-unstable; };
+            home-manager.users.nki = import ./macbook-home.nix;
+          }	
+      ];
+      inputs = { 
+	inherit darwin nixpkgs-unstable;
+	nixpkgs = nixpkgs-unstable;
+      };
+    };
+  };
+}

macbook-home.nix

@@ -1,7 +1,7 @@
-{ config, pkgs, ... }:
+{ config, pkgs, nixpkgs-unstable, ... }:
 
 let
-    x86pkgs = import <nixpkgs> { config.allowUnsupportedSystem = true; };
+    x86pkgs = import nixpkgs-unstable { system = pkgs.system; config.allowUnsupportedSystem = true; };
 in
 {
   imports = [ ./common.nix ];