From ae69b5941d970301eda4f26a7015451138ca1e6e Mon Sep 17 00:00:00 2001
From: Adam Bergmark <adam@bergmark.nl>
Date: Wed, 29 Jun 2016 23:46:44 +0200
Subject: [PATCH] cartel upper bound for #1664

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index cd677e7a..0af22c77 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2403,6 +2403,9 @@ packages:
         # https://github.com/fpco/stackage/issues/1597
         - tagsoup < 0.14
 
+        # https://github.com/fpco/stackage/issues/1664
+        - cartel < 0.18.0.0
+
 # end of packages