From c962702b5703090b3ab3db0d700a15d0fcfcab43 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <vcunat@gmail.com>
Date: Sun, 12 Nov 2017 10:05:45 +0100
Subject: [PATCH] ncurses5: fix by building with gcc6

I don't see how to bypass
  error: no matching function for call to 'NCursesUserPanel<T>::get_user() const'
and we use this to bootstrap ghc.
---
 pkgs/top-level/all-packages.nix | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 509cb2ca58fe..f1c39fddb36e 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9963,8 +9963,13 @@ with pkgs;
 
   notify-sharp = callPackage ../development/libraries/notify-sharp { };
 
-  ncurses5 = callPackage ../development/libraries/ncurses { abiVersion = "5"; };
-  ncurses6 = callPackage ../development/libraries/ncurses { abiVersion = "6"; };
+  ncurses5 = callPackage ../development/libraries/ncurses {
+    stdenv = if stdenv.cc.isGNU then overrideCC stdenv gcc6 else stdenv; # Hacky!
+    abiVersion = "5";
+  };
+  ncurses6 = callPackage ../development/libraries/ncurses {
+    abiVersion = "6";
+  };
   ncurses = if stdenv.isDarwin then ncurses5 else ncurses6;
 
   neardal = callPackage ../development/libraries/neardal { };