From 7c4c575cb323d5d8a19b171c7ac012ae7bae0e3a Mon Sep 17 00:00:00 2001
From: Mihai Maruseac <mihai.maruseac@gmail.com>
Date: Tue, 27 Aug 2019 16:12:07 -0700
Subject: [PATCH] Add more blockers for #4646

---
 build-constraints.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/build-constraints.yaml b/build-constraints.yaml
index cd0f76da..434392a0 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4778,6 +4778,11 @@ packages:
 
         # https://github.com/commercialhaskell/stackage/issues/4781
         - generic-deriving < 1.13
+
+        # https://github.com/commercialhaskell/stackage/issues/4646
+        - singletons < 2.6
+        - eliminators < 0.6
+        - th-desugar < 1.10
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of