From 856d583feb873850eaf6f895dd6a5c66826c8a2d Mon Sep 17 00:00:00 2001
From: Dan Burton <danburton.email@gmail.com>
Date: Fri, 9 Mar 2018 06:43:54 -0800
Subject: [PATCH] Add constraint cabal2nix < 2.9 per Cabal >2.2

---
 build-constraints.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/build-constraints.yaml b/build-constraints.yaml
index ab094df1..649fe02d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3454,6 +3454,7 @@ packages:
         - websockets-simple < 0.1
 
         # Requires too-new or too-old Cabal
+        - cabal2nix < 2.9 # Cabal >2.2
         - distribution-nixpkgs < 1.1.1 # Cabal >2.2
         - haskell-tools-builtin-refactorings < 1.0.1.1 # via minisat-solver via easyrender, Cabal < 2
         - hackage-db < 2.0.1 # Cabal >2.2