From 5aed799ae0923b94c5a38c07c5885d20b9d42156 Mon Sep 17 00:00:00 2001
From: Will Dietz <w@wdtz.org>
Date: Sun, 14 Jan 2018 01:02:05 -0600
Subject: [PATCH] iputils: only use libidn on non-musl

---
 pkgs/os-specific/linux/iputils/default.nix | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/pkgs/os-specific/linux/iputils/default.nix b/pkgs/os-specific/linux/iputils/default.nix
index dd5770744bf..fd07f365e48 100644
--- a/pkgs/os-specific/linux/iputils/default.nix
+++ b/pkgs/os-specific/linux/iputils/default.nix
@@ -23,11 +23,12 @@ stdenv.mkDerivation rec {
       -i doc/Makefile
   '';
 
-  makeFlags = "USE_GNUTLS=no";
+  # Disable idn usage w/musl: https://github.com/iputils/iputils/pull/111
+  makeFlags = [ "USE_GNUTLS=no" ] ++ stdenv.lib.optional stdenv.hostPlatform.isMusl "USE_IDN=no";
 
   buildInputs = [
-    libsysfs opensp openssl libcap docbook_sgml_dtd_31 SGMLSpm libgcrypt libidn nettle
-  ];
+    libsysfs opensp openssl libcap docbook_sgml_dtd_31 SGMLSpm libgcrypt nettle
+  ] ++ stdenv.lib.optional (!stdenv.hostPlatform.isMusl) libidn;
 
   buildFlags = "man all ninfod";