From ad8c10e246bd019407861fd5b23d8d698f86fbb3 Mon Sep 17 00:00:00 2001
From: Moritz Angermann <moritz.angermann@gmail.com>
Date: Sun, 15 Jul 2018 16:25:09 +0800
Subject: [PATCH] [ghc] assert gmp

---
 pkgs/development/compilers/ghc/8.4.3.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/development/compilers/ghc/8.4.3.nix b/pkgs/development/compilers/ghc/8.4.3.nix
index 182afa6b3496..a5cac666e587 100644
--- a/pkgs/development/compilers/ghc/8.4.3.nix
+++ b/pkgs/development/compilers/ghc/8.4.3.nix
@@ -32,6 +32,8 @@
   ghcFlavour ? stdenv.lib.optionalString (targetPlatform != hostPlatform) "perf-cross"
 }:
 
+assert !enableIntegerSimple -> gmp != null;
+
 let
   inherit (bootPkgs) ghc;