From 4b1627d313c1822aeef55929874204e5e5e99058 Mon Sep 17 00:00:00 2001
From: Mitsuhiro Nakamura <m.nacamura@gmail.com>
Date: Mon, 26 Feb 2018 10:47:57 +0900
Subject: [PATCH] rPackages.xml2: fix darwin build

---
 pkgs/development/r-modules/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/r-modules/default.nix b/pkgs/development/r-modules/default.nix
index 9ff7d1da71b2..24228dd9a808 100644
--- a/pkgs/development/r-modules/default.nix
+++ b/pkgs/development/r-modules/default.nix
@@ -369,7 +369,7 @@ let
     VBmix = [ pkgs.gsl_1 pkgs.fftw pkgs.qt4 ];
     WhopGenome = [ pkgs.zlib.dev ];
     XBRL = [ pkgs.zlib pkgs.libxml2.dev ];
-    xml2 = [ pkgs.libxml2.dev ];
+    xml2 = [ pkgs.libxml2.dev ] ++ lib.optionals stdenv.isDarwin [ pkgs.perl ];
     XML = [ pkgs.libtool pkgs.libxml2.dev pkgs.xmlsec pkgs.libxslt ];
     affyPLM = [ pkgs.zlib.dev ];
     bamsignals = [ pkgs.zlib.dev ];