diff --git a/build-constraints.yaml b/build-constraints.yaml
index 4365ab7f..04590e49 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1022,7 +1022,7 @@ packages:
         - BoundedChan
         - broadcast-chan
         - bytestring-lexing
-        - bytestring-trie
+        # - bytestring-trie # build failure GHC 8.4
         - data-accessor
         - data-accessor-mtl
         - fuzzcheck
@@ -2370,7 +2370,7 @@ packages:
 
     "Anthony Cowley <acowley@gmail.com> @acowley":
         - Frames
-        - hpp
+        # - hpp # GHC 8.4 via bytestring-trie
 
     "Takayuki Muranushi <muranushi@gmail.com> @nushio3":
         - binary-search