From c54c3cb5cef4ff05ea7af017afbf8c2e294c1f2d Mon Sep 17 00:00:00 2001
From: John Ericson <Ericson2314@Yahoo.com>
Date: Sat, 3 Jun 2017 16:57:52 -0400
Subject: [PATCH] mpfs: Fix for cross by disabling check

check phase is now only disabled by *default* for cross, but mpfr
was forcing it always.
---
 pkgs/development/libraries/mpfr/default.nix | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/pkgs/development/libraries/mpfr/default.nix b/pkgs/development/libraries/mpfr/default.nix
index 8dbe150e2cb..4f9a9fb9bd0 100644
--- a/pkgs/development/libraries/mpfr/default.nix
+++ b/pkgs/development/libraries/mpfr/default.nix
@@ -1,4 +1,6 @@
-{ stdenv, fetchurl, gmp }:
+{ stdenv, fetchurl, gmp
+, buildPlatform, hostPlatform
+}:
 
 stdenv.mkDerivation rec {
   name = "mpfr-3.1.3";
@@ -19,10 +21,10 @@ stdenv.mkDerivation rec {
   hardeningDisable = [ "stackprotector" ];
 
   configureFlags =
-    stdenv.lib.optional stdenv.isSunOS "--disable-thread-safe" ++
-    stdenv.lib.optional stdenv.is64bit "--with-pic";
+    stdenv.lib.optional hostPlatform.isSunOS "--disable-thread-safe" ++
+    stdenv.lib.optional hostPlatform.is64bit "--with-pic";
 
-  doCheck = true;
+  doCheck = hostPlatform == buildPlatform;
 
   enableParallelBuilding = true;