From b906c8f5810cdcc73eb96d675bcfce77a56cfc04 Mon Sep 17 00:00:00 2001
From: Dan Burton <danburton.email@gmail.com>
Date: Sun, 28 Jan 2018 12:15:18 -0800
Subject: [PATCH] Add constraint "lens < 4.16" per #3238

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 7ab8877a..b6a75950 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3271,6 +3271,9 @@ packages:
         # https://github.com/fpco/stackage/issues/3237
         - hpack < 0.23
 
+        # https://github.com/fpco/stackage/issues/3238
+        - lens < 4.16
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of