From fc141a889d05b05719f6b70f617cc500beea3c38 Mon Sep 17 00:00:00 2001
From: Kasper <kasgal@posteo.net>
Date: Thu, 15 Apr 2021 23:18:51 +0200
Subject: [PATCH] libselinux: fix build with musl (#119472)
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Co-authored-by: Kasper Gałkowski <kpg@posteo.net>
Co-authored-by: Sandro <sandro.jaeckel@gmail.com>
---
 pkgs/os-specific/linux/libselinux/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/os-specific/linux/libselinux/default.nix b/pkgs/os-specific/linux/libselinux/default.nix
index 2c9239b2e7d8..fbf7e4bd995a 100644
--- a/pkgs/os-specific/linux/libselinux/default.nix
+++ b/pkgs/os-specific/linux/libselinux/default.nix
@@ -44,6 +44,11 @@ stdenv.mkDerivation rec {
     "PYTHONLIBDIR=$(py)/${python3.sitePackages}"
   ];
 
+  postPatch = lib.optionalString stdenv.hostPlatform.isMusl ''
+    substituteInPlace src/procattr.c \
+      --replace "#include <unistd.h>" ""
+  '';
+
   preInstall = optionalString enablePython ''
     mkdir -p $py/${python3.sitePackages}/selinux
   '';