set hostname in shared config

lib/nixos.nix

@@ -9,7 +9,8 @@ in rec {
     inherit system;
 
     # Make our inputs available to the configuration.nix (for importing modules)
-    specialArgs = { inherit inputs; };
+    # specialArgs are propagated to all modules
+    specialArgs = { inherit inputs hostname; };
 
     modules = builtins.concatLists [
       [
@@ -39,7 +40,6 @@ in rec {
           home-manager.useUserPackages = true;
 
           # User specific config file
-          # Is marked as error but correct
           home-manager.users.${username}.imports = [ ../home/${username} ];
         }
       ]

nixos/configuration.nix

@@ -2,7 +2,7 @@
 # your system.  Help is available in the configuration.nix(5) man page
 # and in the NixOS manual (accessible by running ‘nixos-help’).
 
-{ inputs, lib, config, pkgs, ... }:
+{ inputs, hostname, lib, config, pkgs, ... }:
 
 {
   imports = [
@@ -111,7 +111,9 @@
   # TODO: Other ports (tcp/udp/ssh...)?
   # Open ports in the firewall.
   networking = {
-    # hostName = "nixinator"; # Define your hostname. # NOTE: Done in host specific config
+    # Gets inherited from flake in nixos mylib
+    hostName = hostname; # Define your hostname.
+
     # wireless.enable = true;  # Enables wireless support via wpa_supplicant.
 
     # Configure network proxy if necessary

nixos/nixinator/default.nix

@@ -1,4 +1,4 @@
-{ config, lib, pkgs, musnix, ... }:
+{ musnix, config, lib, pkgs, ... }:
 
 {
   imports = [
@@ -6,8 +6,6 @@
     ./hardware-configuration.nix
   ];
 
-  networking.hostName = "nixinator"; # Define your hostname.
-
   musnix = {
     enable = true;
     # musnix.soundcardPciId = ;

nixos/nixtop/default.nix

@@ -6,8 +6,6 @@
     ./hardware-configuration.nix
   ];
 
-  networking.hostName = "nixtop"; # Define your hostname.
-
   services.xserver = {
     # Configure keymap in X11
     layout = "de";