Set hostname in host module.

flake.nix

@@ -10,13 +10,13 @@
 
   outputs = { self, nixpkgs, deploy-rs, ... }@inputs:
     let
-      mkNixos = hostname: modules: nixpkgs.lib.nixosSystem {
+      mkNixos = modules: nixpkgs.lib.nixosSystem {
         inherit modules;
-        specialArgs = { inherit inputs hostname; };
+        specialArgs = { inherit inputs; };
       };
     in {
       nixosConfigurations = {
-        c1 = mkNixos "c1" [ ./hosts/c1 ];
+        c1 = mkNixos [ ./hosts/c1 ];
       };
 
       deploy = {

hosts/c1/default.nix

@@ -1,4 +1,4 @@
-{ pkgs, inputs, hostname, ... }:
+{ pkgs, inputs, ... }:
 {
   imports = [ 
     ../common/global
@@ -6,7 +6,7 @@
     ./hardware.nix
   ];
 
-  networking.hostName = hostname;
+  networking.hostName = "c1";
 
   swapDevices = pkgs.lib.mkForce [ {
     device = "/dev/disk/by-id/nvme-eui.002538b981b03d98-part2";