From 63f5c05a50a71efdf54531571f8842dbde6f9dda Mon Sep 17 00:00:00 2001
From: Joe Kachmar <joseph.kachmar@gmail.com>
Date: Tue, 4 Feb 2020 03:28:24 +0000
Subject: [PATCH] Restricts lens < 4.19 (#5122)

---
 build-constraints.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 4d062baf..f5778fb8 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -860,7 +860,7 @@ packages:
         - kan-extensions
         - keys
         - lca
-        - lens
+        - lens < 4.19 # https://github.com/commercialhaskell/stackage/issues/5122
         - lens-action
         - lens-aeson
         - lens-properties