Restructure the interna of the flake

flake.nix

@@ -8,25 +8,12 @@
 
   outputs = { self, nixpkgs, flake-utils }: 
     let
-      system = import ./lib/system.nix {
-        inherit nixpkgs;
-      };
       systems = [
         {
           name = "nixos";
         }
       ];
-    in {
-      nixosConfigurations = builtins.listToAttrs
-        (
-          builtins.map (
-            { name, ... }@config:
-              {
-                inherit name;
-                value = system config;
-              })
-            systems);
-    } //
+    in 
       flake-utils.lib.eachDefaultSystem (
         system:
         let
@@ -39,5 +26,37 @@
                 nixos-rebuild
               ];
             });
-        });
+        }
+      ) //
+      {
+        nixosConfigurations = builtins.listToAttrs
+          (
+            builtins.map (
+              { name, system ? "x86_64-linux", ... }@config:
+                {
+                  inherit name;
+
+                  value = nixpkgs.lib.nixosSystem {
+                    inherit system;
+
+                    modules = [
+                      ({ ... }: { config._module.args = { machineConfig = config; }; })
+                      ./lib/configuration.nix
+
+                      (
+                        let
+                          configCandidate = ./lib/machines/${name}.nix;
+                          machineConfigPath =
+                            if builtins.pathExists configCandidate
+                            then
+                              configCandidate
+                            else
+                              ./lib/hardware/base.nix;
+                        in
+                          machineConfigPath)
+                    ];
+                  };
+                })
+              systems);
+      };
 }

lib/configuration.nix

@@ -0,0 +1,25 @@
+{ machineConfig, ... }: {
+  imports = [
+    ./modules/custom-build-vm.nix
+  ];
+
+  config = {
+    system.stateVersion = "23.11";
+
+    virtualisation =
+      let
+        vmConfig = {
+          virtualisation = {
+            sharedHostKeys = true;
+            virt-viewer = true;
+          };
+        };
+      in {
+        vmVariant = vmConfig;
+        vmVariantWithBootLoader = vmConfig;
+      };
+
+    # Networking
+    networking.hostName = machineConfig.name;
+  };
+}

lib/system.nix

@@ -1,40 +0,0 @@
-{ nixpkgs }:
-  { name, dualBoot ? false } :
-    let
-      lib = nixpkgs.lib;
-      configPath = ./machines/${name}.nix;
-      machineConfig =
-        if builtins.pathExists configPath then
-          configPath
-        else
-          ./hardware/base.nix;
-    in lib.nixosSystem {
-      system = "x86_64-linux";
-      modules = [
-        (
-          { config, pkgs, lib, ... }: {
-            imports = [
-              machineConfig
-              ./modules/custom-build-vm.nix
-            ];
-
-            system.stateVersion = "23.11";
-
-            virtualisation =
-              let
-                vmConfig = {
-                  virtualisation = {
-                    sharedHostKeys = true;
-                    virt-viewer = true;
-                  };
-                };
-              in {
-                vmVariant = vmConfig;
-                vmVariantWithBootLoader = vmConfig;
-              };
-
-            # Networking
-            networking.hostName = name;
-          })
-      ];
-    }