Automatically set machine hostname

flake.nix

@@ -55,7 +55,7 @@
     {
       nixosConfigurations =
         let
-          modules = system: with inputs; [
+          modules = system: hostname: with inputs; [
             ./common
             simple-nixos-mailserver.nixosModule
             agenix.nixosModules.default
@@ -63,19 +63,23 @@
             archivebox.nixosModule
             nix-index-database.nixosModules.nix-index
             ({ lib, ... }: {
-              config.environment.systemPackages = [
+              config = {
+                environment.systemPackages = [
                   agenix.packages.${system}.agenix
                 ];
 
+                networking.hostName = hostname;
+              };
+
               # because nixos specialArgs doesn't work for containers... need to pass in inputs a different way
               options.inputs = lib.mkOption { default = inputs; };
               options.currentSystem = lib.mkOption { default = system; };
             })
           ];
 
-          mkSystem = system: nixpkgs: path:
+          mkSystem = system: nixpkgs: path: hostname:
             let
-              allModules = modules system;
+              allModules = modules system hostname;
 
               # allow patching nixpkgs, remove this hack once this is solved: https://github.com/NixOS/nix/issues/3920
               patchedNixpkgsSrc = nixpkgs.legacyPackages.${system}.applyPatches {
@@ -99,7 +103,7 @@
         in
         nixpkgs.lib.mapAttrs
           (hostname: cfg:
-            mkSystem cfg.arch nixpkgs cfg.configurationPath)
+            mkSystem cfg.arch nixpkgs cfg.configurationPath hostname)
           machines;
 
       packages =

machines/phil/default.nix

@@ -5,7 +5,6 @@
     ./hardware-configuration.nix
   ];
 
-  networking.hostName = "phil";
   services.gitea-runner = {
     enable = true;
     instanceUrl = "https://git.neet.dev";

machines/ponyo/default.nix

@@ -5,8 +5,6 @@
     ./hardware-configuration.nix
   ];
 
-  networking.hostName = "ponyo";
-
   system.autoUpgrade.enable = true;
 
   # p2p mesh network

machines/ray/default.nix

@@ -5,8 +5,6 @@
     ./hardware-configuration.nix
   ];
 
-  networking.hostName = "ray";
-
   # for luks onlock over tor
   services.tor.enable = true;
   services.tor.client.enable = true;

machines/router/default.nix

@@ -11,8 +11,6 @@
   # https://github.com/skogsbrus/os/blob/master/sys/router.nix
   # http://trac.gateworks.com/wiki/wireless/wifi 
 
-  networking.hostName = "router";
-
   system.autoUpgrade.enable = true;
 
   services.tailscale.exitNode = true;

machines/storage/s0/default.nix

@@ -5,8 +5,6 @@
     ./hardware-configuration.nix
   ];
 
-  networking.hostName = "s0";
-
   system.autoUpgrade.enable = true;
 
   services.iperf3.enable = true;