From 9bd9a52a128b33cc9ae0f1809e17eb672e410efe Mon Sep 17 00:00:00 2001
From: Dan Burton <danburton.email@gmail.com>
Date: Fri, 9 Mar 2018 06:38:44 -0800
Subject: [PATCH] Add constraints for Cabal

---
 build-constraints.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 1a3e020c..def9fa07 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3453,6 +3453,11 @@ packages:
         # (downstream build failure)
         - websockets-simple < 0.1
 
+        # Requires too-new or too-old Cabal
+        - 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
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of