From 3fa2b9059d65c1dca7c73ebcc1718bd129a07c1a Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Sun, 16 Apr 2023 15:45:17 +0100
Subject: [PATCH] libmad: split headers to "dev" output

---
 pkgs/development/libraries/libmad/default.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/development/libraries/libmad/default.nix b/pkgs/development/libraries/libmad/default.nix
index dd792348686..97602839367 100644
--- a/pkgs/development/libraries/libmad/default.nix
+++ b/pkgs/development/libraries/libmad/default.nix
@@ -9,6 +9,8 @@ stdenv.mkDerivation rec {
     sha256 = "14460zhacxhswnzb36qfpd1f2wbk10qvksvm6wyq5hpvdgnw7ymv";
   };
 
+  outputs = [ "out" "dev" ];
+
   patches = [
     (fetchpatch {
       url = "https://github.com/openwrt/packages/raw/openwrt-19.07/libs/libmad/patches/001-mips_removal_h_constraint.patch";