From 2077956e7813fcc57f45d07a4b46715d0cd592ce Mon Sep 17 00:00:00 2001
From: Artturin <Artturin@artturin.com>
Date: Sat, 20 Nov 2021 01:32:55 +0200
Subject: [PATCH] nixos/network-interfaces: add a warning for underscores in
 hostname

until the issues in https://github.com/NixOS/nixpkgs/pull/138978
have been resolved
---
 nixos/modules/tasks/network-interfaces.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/nixos/modules/tasks/network-interfaces.nix b/nixos/modules/tasks/network-interfaces.nix
index 4e20ec118464..38b7f66bae4f 100644
--- a/nixos/modules/tasks/network-interfaces.nix
+++ b/nixos/modules/tasks/network-interfaces.nix
@@ -417,7 +417,11 @@ in
         network node hostname (uname --nodename) the option
         boot.kernel.sysctl."kernel.hostname" can be used as a workaround (but
         the 64 character limit still applies).
+
+        WARNING: Do not use underscores (_) or you may run into unexpected issues.
       '';
+       # warning until the issues in https://github.com/NixOS/nixpkgs/pull/138978
+       # are resolved
     };
 
     networking.fqdn = mkOption {