From 578003af409a21c21eaddfbb2bf8339927060129 Mon Sep 17 00:00:00 2001
From: Jan Tojnar <jtojnar@gmail.com>
Date: Fri, 21 Dec 2018 21:46:15 +0100
Subject: [PATCH] pidgin-mra: Do not abuse DESTDIR

---
 .../pidgin-plugins/pidgin-mra/default.nix             | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/pkgs/applications/networking/instant-messengers/pidgin-plugins/pidgin-mra/default.nix b/pkgs/applications/networking/instant-messengers/pidgin-plugins/pidgin-mra/default.nix
index 574c01c2cde..18bf89a5f2e 100644
--- a/pkgs/applications/networking/instant-messengers/pidgin-plugins/pidgin-mra/default.nix
+++ b/pkgs/applications/networking/instant-messengers/pidgin-plugins/pidgin-mra/default.nix
@@ -15,13 +15,16 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkgconfig ];
   buildInputs = [ pidgin ];
 
-  preConfigure = ''
+  postPatch = ''
     sed -i 's|-I/usr/include/libpurple|$(shell pkg-config --cflags purple)|' Makefile
-    export DESTDIR=$out
-    export LIBDIR=/lib
-    export DATADIR=/share
   '';
 
+  makeFlags = [
+    "DESTDIR=/"
+    "LIBDIR=${placeholder "out"}/lib"
+    "DATADIR=${placeholder "out"}/share"
+  ];
+
   meta = {
     homepage = https://github.com/dreadatour/pidgin-mra;
     description = "Mail.ru Agent plugin for Pidgin / libpurple";