From ea3bf779b9d8831d5e0b3f8548ca9354b8da0bcb Mon Sep 17 00:00:00 2001
From: Alexey Zabelin <hello@alexeyzabelin.com>
Date: Sun, 9 Dec 2018 17:23:21 -0500
Subject: [PATCH] Add upper bound for alsa-mixer, #4221

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 212dfc7d..842fc613 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3889,6 +3889,9 @@ packages:
         # https://github.com/commercialhaskell/stackage/issues/4214
         - haskell-src-exts < 1.21
 
+        # https://github.com/commercialhaskell/stackage/issues/4221
+        - alsa-mixer < 0.3
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of