From 469a15d3865e50bc2cf97a8cbac43357137febf3 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Fri, 9 Mar 2018 15:40:16 +0100
Subject: [PATCH] distribution-nixpkgs: fix build with GHC 8.2.2

---
 .../development/haskell-modules/configuration-ghc-8.2.x.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.2.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.2.x.nix
index 90b142a1f0e2..44a08d585b4f 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.2.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.2.x.nix
@@ -91,4 +91,10 @@ self: super: {
     text = self.text_1_2_3_0;
   });
 
+  # Needs Cabal 2.2.x, which is not the default.
+  distribution-nixpkgs = super.distribution-nixpkgs.overrideScope (self: super: {
+    Cabal = self.Cabal_2_2_0_0;
+    text = self.text_1_2_3_0;
+  });
+
 }