initial work to support multiple home configs

flake.lock

@@ -36,10 +36,27 @@
         "type": "github"
       }
     },
+    "nixpkgs-23_05": {
+      "locked": {
+        "lastModified": 1689956312,
+        "narHash": "sha256-NV9yamMhE5jgz+ZSM2IgXeYqOvmGIbIIJ+AFIhfD7Ek=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "6da4bc6cb07cba1b8e53d139cbf1d2fb8061d967",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-23.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "home-manager": "home-manager",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-23_05": "nixpkgs-23_05"
       }
     }
   },

flake.nix

@@ -3,27 +3,81 @@
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+    nixpkgs-23_05.url = "github:nixos/nixpkgs/nixos-23.05";
     home-manager = {
       url = "github:nix-community/home-manager";
       inputs.nixpkgs.follows = "nixpkgs";
     };
   };
 
-  outputs = {nixpkgs, home-manager, ...}:
+  outputs = {nixpkgs, home-manager, ...} @inputs:
     let
-      system = "x86_64-linux";
-    in {
-      defaultPackage.${system} = home-manager.defaultPackage.${system};
+      # Overlays enable you to customize the Nixpkgs attribute set
+      overlays = [
+        (self: super:
+          let
+            system = self.stdenv.system;
+          in {
+            pkgs_2305 = inputs.nixpkgs-23_05.legacyPackages.${system};
+            pkgs_aarch64 = import nixpkgs {
+              system = "aarch64-${builtins.head (builtins.match ".+-([[:lower:]]+)" system)}";
+            };
+            pkgs_x86_64 = nixpkgs.legacyPackages.${"x86_64-${builtins.head (builtins.match ".+-([[:lower:]]+)" system)}"};
+          })
+      ];
 
+      # Systems supported
+      allSystems = [
+        "aarch64-linux"
+        "x86_64-linux"
+      ];
+
+      importPkgs = (system: import nixpkgs {
+        inherit overlays system; 
+        config.allowUnfree = true;
+        });
+
+      # Helper to provide system-specific attributes
+      forAllSystems = f: nixpkgs.lib.genAttrs allSystems (system: f {
+        inherit system;
+        pkgs = (importPkgs system);
+      });
+
+    in
+    rec {
+      inherit allSystems importPkgs forAllSystems home-manager;
+
+      overlays = { };
+
+      packages = forAllSystems
+      ({ pkgs, system }: rec {
+        home-penguin = homeConfigurations."john@penguin".activationPackage;
+        home-pixnix = homeConfigurations."john@pixnix".activationPackage;
+        all = pkgs.symlinkJoin {
+          name = "all";
+          paths = [
+            home-penguin
+            home-pixnix
+          ];
+        };
+        default = all;
+        });
+      
       homeConfigurations = {
         "john@penguin" = home-manager.lib.homeManagerConfiguration {
-          pkgs = import nixpkgs {
-            system = "${system}";
-            config.allowUnfree = true;
-          };
+          pkgs = importPkgs "x86_64-linux";
 
-          modules = [ ./nix/machines/penguin/home.nix ];
+          modules = [
+            ./nix/machines/penguin/home.nix
+          ];
+        };
+        "john@pixnix" = home-manager.lib.homeManagerConfiguration {
+          pkgs = importPkgs "x86_64-linux";
+
+          modules = [
+            ./nix/common/home.nix
+          ];
         };
       };
     };
-  }
+}

nix/common/home.nix

@@ -70,6 +70,8 @@
   programs.git = {
     enable = true;
     delta.enable = true;
+    userEmail = "john@bowdre.net";
+    userName = "John Bowdre";
     extraConfig = {
       init.defaultBranch = "main";
       pull.ff = "only";