From 1e1c011a7153948ebae3ff056b516447b619636e Mon Sep 17 00:00:00 2001
From: Dan Burton <danburton.email@gmail.com>
Date: Tue, 18 Dec 2018 09:47:56 -0500
Subject: [PATCH] Block llvm-hs per build failure, see #4238

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 698ab9ae..3be5a754 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2973,7 +2973,7 @@ packages:
 
     "Moritz Kiefer <moritz.kiefer@purelyfunctional.org> @cocreature":
         - lrucaching
-        - llvm-hs
+        - llvm-hs < 0 # https://github.com/commercialhaskell/stackage/issues/4238
         - llvm-hs-pure
 
     "Thierry Bourrillon <thierry.bourrillon@fpinsight.com> @tbourrillon":