From e9c36e2d767018dab98db4a864edb9f9d220fbef Mon Sep 17 00:00:00 2001
From: Robert Scott <code@humanleg.org.uk>
Date: Wed, 25 May 2022 22:45:19 +0100
Subject: [PATCH] coredns: fix tests on darwin

---
 pkgs/servers/dns/coredns/default.nix | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/pkgs/servers/dns/coredns/default.nix b/pkgs/servers/dns/coredns/default.nix
index 7b45f4a85b6d..c93d1235ea82 100644
--- a/pkgs/servers/dns/coredns/default.nix
+++ b/pkgs/servers/dns/coredns/default.nix
@@ -1,4 +1,8 @@
-{ lib, buildGoModule, fetchFromGitHub }:
+{ lib
+, stdenv
+, buildGoModule
+, fetchFromGitHub
+}:
 
 buildGoModule rec {
   pname = "coredns";
@@ -20,6 +24,9 @@ buildGoModule rec {
 
     substituteInPlace test/readme_test.go \
       --replace "TestReadme" "SkipReadme"
+  '' + lib.optionalString stdenv.isDarwin ''
+    # loopback interface is lo0 on macos
+    sed -E -i 's/\blo\b/lo0/' plugin/bind/setup_test.go
   '';
 
   meta = with lib; {