Hook in the hostname separately

flake.nix

@@ -65,6 +65,8 @@
                 (
                   { pkgs, ... }@args: {
                     config._module.args = {
+                      hostname = name;
+
                       machineConfig = (default args) //
                         (config args) // {
                           inherit name;

lib/configuration.nix

@@ -1,4 +1,4 @@
-{ machineConfig, ... }: {
+{ hostname, machineConfig, ... }: {
   imports = [
     ./modules/custom-build-vm.nix
     ./modules/custom-sops-nix.nix
@@ -30,7 +30,7 @@
     users.myUsers = machineConfig.users;
 
     # Networking
-    networking.hostName = machineConfig.name;
+    networking.hostName = hostname;
 
     # Set time zone
     time.timeZone = machineConfig.timeZone;