diff --git a/build-constraints.yaml b/build-constraints.yaml
index 8e412bdd..28dfb47b 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1904,7 +1904,7 @@ packages:
         - mtl-compat
         - proxied
         - text-show
-        - text-show-instances
+        # - text-show-instances # build failure with ghc 8.4 https://github.com/RyanGlScott/text-show-instances/issues/6
         - th-abstraction
         - thread-local-storage
 
@@ -3292,6 +3292,7 @@ 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
         - text-format < 0 # build failure with GHC 8.4 https://github.com/bos/text-format/issues/22
+        - text-show-instances < 0 # build failure with GHC 8.4 https://github.com/RyanGlScott/text-show-instances/issues/6
         - 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
         - vhd < 0 # BuildFailureException Process exited with ExitFailure 1: ./Setup build