diff --git a/build-constraints.yaml b/build-constraints.yaml
index ad943a54..2b4c2bee 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -457,7 +457,7 @@ packages:
         - textlocal
         # - shell-conduit # https://github.com/psibi/shell-conduit/issues/15
         - tldr
-        - fb
+        # - fb # build failure with ghc 8.4 https://github.com/psibi/fb/issues/3
         - yesod-fb
         - yesod-auth-fb
         - hourglass-orphans
@@ -3272,6 +3272,7 @@ packages:
         - b9 < 0 # build failure with GHC 8.4 https://github.com/sheyll/b9-vm-image-builder/issues/4
         - cabal-rpm < 0 # build failure with GHC 8.4 https://github.com/juhp/cabal-rpm/issues/55
         - enummapset < 0 # build failure with GHC 8.4 https://github.com/michalt/enummapset/issues/11
+        - fb < 0 # build failure with GHC 8.4 https://github.com/psibi/fb/issues/3
         - hamtsolo < 0 # build failure with conduit 1.3 https://github.com/tfc/hamtsolo/issues/3
         - hashtables < 0 # build failure with GHC 8.4 https://github.com/gregorycollins/hashtables/issues/45
         - haskell-neo4j-client < 0 # build failure with GHC 8.4 https://github.com/asilvestre/haskell-neo4j-rest-client/issues/32
@@ -3443,6 +3444,7 @@ packages:
         - tasty-html < 0 # BuildFailureException Process exited with ExitFailure 1: ./Setup build
         - fingertree-psqueue < 0 # BuildFailureException Process exited with ExitFailure 1: ./Setup build
         - set-cover < 0 # DependencyFailed (PackageName "enummapset")
+        - yesod-fb < 0 # GHC 8.4 via fb
 
 
     # This section was used to programmatically generate a set of removals