From 34e735fb6bdf2c699c4507741378ef47f52cd013 Mon Sep 17 00:00:00 2001
From: Emanuel Borsboom <emanuel.borsboom@gmail.com>
Date: Fri, 10 Jun 2016 08:03:08 -0700
Subject: [PATCH] Add back `stack` and add its dependency `hpack`

---
 build-constraints.yaml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 67bb2d06..324b3f64 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -733,8 +733,9 @@ packages:
         - Chart-cairo
         # GHC 8 - ghc-events
         - monad-extras
-        # GHC 8 - stack < 9.9.9
+        - stack < 9.9.9
         - optparse-simple
+        - hpack
 
     "Michael Sloan <mgsloan@gmail.com>":
         - th-orphans