flake.nix

@@ -11,59 +11,59 @@
     nixos-hardware.url = github:NixOS/nixos-hardware;
   };
 
-  outputs = args@{ home-manager, nixpkgs, agenix, nixos-hardware, ... }: with nixpkgs; {
+  outputs = args@{ self, home-manager, nixpkgs, agenix, nixos-hardware, ... }: with nixpkgs; {
   
       # Configurations for NixOS machines.
-      nixosConfigurations =
-        let mkUserConfig = path: {
-              imports = [ home-manager.nixosModules.home-manager ];
-              config = {
-                home-manager.users."riley" = (import "${path}/home.nix");
+      nixosConfigurations = let
+        # Generate a user configuration for the given user, based on the given home manager
+        # configuration.
+        userConfig = user: home: [
+          home-manager.nixosModules.home-manager
+          ({ config, ... }: {
+            home-manager.users."${user}" = (home // {
+              config.home = {
+                inherit (config.system) stateVersion;
+                username = user;
               };
-            };
-        in {
-
-          # Desktop system
-          "strawberry" = lib.nixosSystem {
-            system = "x86_64-linux";
-            modules = [
-              (mkUserConfig ./system/strawberry)
-              agenix.nixosModules.default
-              ./system/strawberry/core.nix
-              ./shared/core
-              ./shared/secrets.nix
-            ];
-            specialArgs = args;
-          };
-
-          # Thinkpad
-          "lime" = lib.nixosSystem {
-            system = "x86_64-linux";
-            modules = [
-              (mkUserConfig ./system/lime)
-              agenix.nixosModules.default
-              nixos-hardware.nixosModules.lenovo-thinkpad-x390
-              nixos-hardware.nixosModules.common-gpu-nvidia-disable
-              ./system/lime/core.nix
-              ./shared/core
-              ./shared/secrets.nix
-            ];
-            specialArgs = args;
-          };
-
-        };
-
-      # Configurations for non-NixOS machines.
-      homeConfigurations = with home-manager.lib; {
-        "dev-lt-63" = homeManagerConfiguration {
-          pkgs = nixpkgs.legacyPackages."x86_64-linux";
+            }).config;
+          })
+        ];
+      in {
+        # Desktop system
+        "strawberry" = lib.nixosSystem {
+          system = "x86_64-linux";
           modules = [
-            ./system/dev-lt-63/home.nix
-            ./shared/home
-          ];
+            ./system/strawberry/core.nix
+            ./shared/core
+          ] ++ (userConfig "riley" self.homeConfigurations."strawberry");
+          specialArgs = args;
+        };
+        # Thinkpad
+        "lime" = lib.nixosSystem {
+          system = "x86_64-linux";
+          modules = [
+            ./system/lime/core.nix
+            ./shared/core
+          ] ++ (userConfig "riley" self.homeConfigurations."lime");
+          specialArgs = args;
         };
       };
 
+      # Configurations for home-manager.
+      homeConfigurations = with home-manager.lib; let
+        forEachHost = lib.genAttrs [ "dev-lt-63" "strawberry" "lime" ];
+        pkgs = import nixpkgs {
+          system = "x86_64-linux";
+          overlays = [ self.overlays.default ];
+        };
+      in forEachHost (host: homeManagerConfiguration {
+        inherit pkgs;
+        modules = [
+          ./system/${host}/home.nix
+          ./shared/home
+        ];
+      });
+
       overlays = {
         default = (import ./shared/overlay.nix);
       };

shared/core/default.nix

@@ -1,8 +1,10 @@
-{ pkgs, ... }:
+{ pkgs, agenix, ... }:
 
 {
 
   imports = [
+    agenix.nixosModules.default
+    ../secrets.nix
     ./services.nix
     ./backups.nix
     ./users.nix

system/lime/core.nix

@@ -1,6 +1,10 @@
-{ lib, modulesPath, ... }: {
+{ lib, modulesPath, nixos-hardware, ... }: {
 
-  imports = [./hardware-configuration.nix];
+  imports = [
+    ./hardware-configuration.nix
+    nixos-hardware.nixosModules.lenovo-thinkpad-x390
+    nixos-hardware.nixosModules.common-gpu-nvidia-disable
+  ];
 
   custom = {
     gui.enable = true;
@@ -15,7 +19,5 @@
   system.stateVersion = "22.11";
   services.xserver.libinput.enable = true;
 
-  home-manager.users."riley".home.stateVersion = "22.11";
-
 }
 

system/lime/home.nix

@@ -9,4 +9,5 @@
     };
   };
   programs.iamb.enable = true;
+  home.stateVersion = "22.11";
 }