From cddc7a28b825af49d6d1f8b6d34122e98d3f4c1e Mon Sep 17 00:00:00 2001
From: Florian Klink <flokli@flokli.de>
Date: Mon, 13 Apr 2020 15:18:59 +0200
Subject: [PATCH] nixos/networking: fix setting .macAddress and .mtu with
 networkd

This needs to be set in the .linkConfig of a .network
---
 nixos/modules/tasks/network-interfaces-systemd.nix | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/nixos/modules/tasks/network-interfaces-systemd.nix b/nixos/modules/tasks/network-interfaces-systemd.nix
index 41deceb000e6..23e1e611a71e 100644
--- a/nixos/modules/tasks/network-interfaces-systemd.nix
+++ b/nixos/modules/tasks/network-interfaces-systemd.nix
@@ -94,7 +94,12 @@ in
           address = forEach (interfaceIps i)
             (ip: "${ip.address}/${toString ip.prefixLength}");
           networkConfig.IPv6PrivacyExtensions = "kernel";
-        } ];
+          linkConfig = optionalAttrs (i.macAddress != null) {
+            MACAddress = i.macAddress;
+          } // optionalAttrs (i.mtu != null) {
+            MTUBytes = toString i.mtu;
+          };
+        }];
       })))
       (mkMerge (flip mapAttrsToList cfg.bridges (name: bridge: {
         netdevs."40-${name}" = {