remove inputs

We actually do not depend on any input here. Only if a
nixosConfiguration should be instantiated, but it is already
expected that the user will provide a (more up-to-date) nixpkgs
flake that we use.

export/nixosConfigurations.nix

@@ -1,19 +1,19 @@
 { nixosUsers ? {}, nixosGroups ? {}, nixosModules, hmModules ? { default = {}; }, ...}@flake: { ... }@inputs: { host, ... }@imports: let
-  host' = name: snippets: let
-    system = { namespace?"fbs42", nixpkgs?"nixpkgs" }: inputs.${nixpkgs}.lib.nixosSystem {
+  system = hostname: { namespace ? "fbs42", nixpkgs ? "nixpkgs" }: inputs.${nixpkgs}.lib.nixosSystem {
     specialArgs = { inherit inputs flake namespace; };
-      modules = builtins.concatLists (map (base: builtins.attrValues (flake.lib.scan { base = "${base}/host/${name}"; })) flake.lib.schema.base)
-        ++ [ { config.networking.hostName = name; } ]
+    modules = builtins.concatLists (map (base: builtins.attrValues (flake.lib.scan { base = "${base}/host/${hostname}"; })) flake.lib.schema.base)
+      ++ [ { config.networking.hostName = hostname; } ]
       ++ [ nixosModules.default ]
-        ++ [ inputs.home-manager.nixosModules.default ]
-        ++ [ { config.home-manager.sharedModules = [ hmModules.default ]; } ]
-        ++ [ { config.home-manager.extraSpecialArgs = { inherit flake namespace; }; } ]
+      ++ inputs.${nixpkgs}.lib.optional (inputs ? home-manager) {
+        imports = [ inputs.home-manager.nixosModules.default ];
+        config.home-manager = {
+          sharedModules = [ hmModules.default ];
+          extraSpecialArgs = { inherit flake namespace; };
+        };
+      }
       ++ builtins.attrValues nixosUsers
       ++ builtins.attrValues nixosGroups
       ;
   };
 
-    cfg = assert builtins.length snippets == 1; builtins.head snippets;
-  in system cfg;
-
-in builtins.mapAttrs host' host
+in builtins.mapAttrs (name: value: assert builtins.length value == 1; system name (builtins.head value)) host

flake.lock

@@ -1,64 +1,6 @@
 {
   "nodes": {
-    "hardware": {
-      "locked": {
-        "lastModified": 1762847253,
-        "narHash": "sha256-BWWnUUT01lPwCWUvS0p6Px5UOBFeXJ8jR+ZdLX8IbrU=",
-        "owner": "nixos",
-        "repo": "nixos-hardware",
-        "rev": "899dc449bc6428b9ee6b3b8f771ca2b0ef945ab9",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nixos",
-        "repo": "nixos-hardware",
-        "type": "github"
-      }
-    },
-    "home-manager": {
-      "inputs": {
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1747688870,
-        "narHash": "sha256-ypL9WAZfmJr5V70jEVzqGjjQzF0uCkz+AFQF7n9NmNc=",
-        "owner": "nix-community",
-        "repo": "home-manager",
-        "rev": "d5f1f641b289553927b3801580598d200a501863",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "ref": "release-24.11",
-        "repo": "home-manager",
-        "type": "github"
-      }
-    },
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1751274312,
-        "narHash": "sha256-/bVBlRpECLVzjV19t5KMdMFWSwKLtb5RyXdjz3LJT+g=",
-        "owner": "nixos",
-        "repo": "nixpkgs",
-        "rev": "50ab793786d9de88ee30ec4e4c24fb4236fc2674",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nixos",
-        "ref": "nixos-24.11",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "root": {
-      "inputs": {
-        "hardware": "hardware",
-        "home-manager": "home-manager",
-        "nixpkgs": "nixpkgs"
-      }
-    }
+    "root": {}
   },
   "root": "root",
   "version": 7

flake.nix

@@ -1,12 +1,3 @@
 {
-  inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
-    hardware.url = "github:nixos/nixos-hardware";
-    home-manager = {
-      url = "github:nix-community/home-manager/release-24.11";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
-  };
-
   outputs = { self, ... }@inputs: import ./lib/flake.nix inputs ./.;
 }