From e3dd2def91d06804640116af8abbe0c5b5949b05 Mon Sep 17 00:00:00 2001
From: Misha Gusarov <dottedmag@dottedmag.net>
Date: Sun, 28 Feb 2021 16:48:56 +0000
Subject: [PATCH] linux-pam: Optionally build with libxcrypt

This enables support for new password hashing functions in PAM.

A part of #112371.
---
 pkgs/os-specific/linux/pam/default.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/os-specific/linux/pam/default.nix b/pkgs/os-specific/linux/pam/default.nix
index a697bb17a43c..fb993699494f 100644
--- a/pkgs/os-specific/linux/pam/default.nix
+++ b/pkgs/os-specific/linux/pam/default.nix
@@ -1,5 +1,6 @@
 { lib, stdenv, buildPackages, fetchurl, flex, cracklib, db4, gettext
 , nixosTests
+, withLibxcrypt ? false, libxcrypt
 }:
 
 stdenv.mkDerivation rec {
@@ -17,7 +18,8 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ flex ]
     ++ lib.optional stdenv.buildPlatform.isDarwin gettext;
 
-  buildInputs = [ cracklib db4 ];
+  buildInputs = [ cracklib db4 ]
+    ++ lib.optional withLibxcrypt libxcrypt;
 
   enableParallelBuilding = true;