From 0cd5ebb48fd89c94117e897239a638972181a8e8 Mon Sep 17 00:00:00 2001
From: Matthew Pickering <matthewtpickering@gmail.com>
Date: Sat, 24 Dec 2016 17:37:04 +0000
Subject: [PATCH] Configure checkPhase for ghcHEAD

The testsuite requires python3 so we have to add it as a dependency.
---
 pkgs/development/compilers/ghc/head.nix | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/compilers/ghc/head.nix b/pkgs/development/compilers/ghc/head.nix
index 7573451695c..8cecb4d605b 100644
--- a/pkgs/development/compilers/ghc/head.nix
+++ b/pkgs/development/compilers/ghc/head.nix
@@ -1,11 +1,11 @@
 { stdenv, fetchgit, bootPkgs, perl, gmp, ncurses, libiconv, binutils, coreutils
-, autoconf, automake, happy, alex, crossSystem, selfPkgs, cross ? null
+, autoconf, automake, happy, alex, python3, crossSystem, selfPkgs, cross ? null
 }:
 
 let
   inherit (bootPkgs) ghc;
 
-  commonBuildInputs = [ ghc perl autoconf automake happy alex ];
+  commonBuildInputs = [ ghc perl autoconf automake happy alex python3 ];
 
   version = "8.1.20161115";
 
@@ -52,6 +52,8 @@ in stdenv.mkDerivation (rec {
   # that in turn causes GHCi to abort
   stripDebugFlags = [ "-S" ] ++ stdenv.lib.optional (!stdenv.isDarwin) "--keep-file-symbols";
 
+  checkTarget = "test";
+
   postInstall = ''
     paxmark m $out/lib/${name}/bin/{ghc,haddock}