From 8ee3d73ef8b068a11c77c31e4ef6b9420038c763 Mon Sep 17 00:00:00 2001
From: Mihai Maruseac <mihai.maruseac@gmail.com>
Date: Sun, 1 Oct 2017 16:14:48 -0700
Subject: [PATCH] Upper bound fingertree since it fails reducers (#2920)

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 152cfb1f..3ad975f6 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3424,6 +3424,9 @@ packages:
 
         # https://github.com/sol/hpack/issues/202
         - Glob < 0.9.0
+
+        # https://github.com/fpco/stackage/issues/2920
+        - fingertree < 0.1.2
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of