diff --git a/build-constraints.yaml b/build-constraints.yaml
index 2f1cd2fc..b67994d3 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3127,7 +3127,7 @@ packages:
         - time-locale-vietnamese
 
     "Tim McGilchrist <timmcgil@gmail.com>  @tmcgilchrist":
-        - riak
+        # - riak # build failure with GHC 8.4 https://github.com/riak-haskell-client/riak-haskell-client/issues/105
         - airship
 
     "Sam Stites <sam@stites.io> @stites":
@@ -3295,6 +3295,7 @@ packages:
         - pushbullet-types < 0 # build failure with GHC 8.4 https://github.com/tsani/pushbullet-hs/issues/1
         - rainbow < 0 # build failure with GHC 8.4 https://github.com/massysett/rainbow/issues/6
         - reroute < 0 # build faiulre with GHC 8.4 https://github.com/agrafix/Spock/issues/140
+        - riak < 0 # build failure with GHC 8.4 https://github.com/riak-haskell-client/riak-haskell-client/issues/105
         - text-format < 0 # build failure with GHC 8.4 https://github.com/bos/text-format/issues/22
         - tinylog < 0 # build failure with GHC 8.4 https://gitlab.com/twittner/tinylog/issues/1
         - type-combinators < 0 # build failure with GHC 8.4 https://github.com/kylcarte/type-combinators/issues/8