From 955ea14c3038d6f8a0791baf17dd91dd4acda720 Mon Sep 17 00:00:00 2001
From: Adam Bergmark <adam@bergmark.nl>
Date: Wed, 21 Dec 2016 23:46:14 +0100
Subject: [PATCH] Upper bound for #2151

---
 build-constraints.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 00d3a4bc..09e635b0 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2735,6 +2735,9 @@ packages:
         # https://github.com/fpco/stackage/issues/2148
         - rattletrap < 2.1.0
 
+        # https://github.com/fpco/stackage/issues/2151
+        - declarative < 0.5.0
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of