From e4865c5e5c5fded5a096dc931e177dccd0c3726f Mon Sep 17 00:00:00 2001
From: Michael Snoyman <michael@snoyman.com>
Date: Sat, 22 Sep 2018 20:54:27 +0300
Subject: [PATCH] Upper bound on stm for #3990

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 11c3809f..d7b9857d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3751,6 +3751,9 @@ packages:
         - eliminators < 0.5
         - th-desugar < 1.9
 
+        # https://github.com/commercialhaskell/stackage/issues/3990
+        - stm < 2.5
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of