From 9e06f6880c5446bc9de4c40db830d63cc43eb295 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Sun, 31 Jan 2016 22:28:05 +0100
Subject: [PATCH] cabal-install: build with native Cabal library when compiling
 with GHC 8.0.x

Fixes https://github.com/NixOS/nixpkgs/issues/12726.
---
 pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix
index 118d9966b68..d9a5702a094 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix
@@ -34,6 +34,9 @@ self: super: {
   unix = null;
   xhtml = null;
 
+  # cabal-install can use the native Cabal library.
+  cabal-install = super.cabal-install.override { Cabal = null; };
+
   # jailbreak-cabal can use the native Cabal library.
   jailbreak-cabal = super.jailbreak-cabal.override { Cabal = null; };