diff --git a/build-constraints.yaml b/build-constraints.yaml
index dca2fc53..f8f3e9b4 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3324,7 +3324,7 @@ packages:
     "Build failure with GHC 8.4":
         - Chart < 0 # build failure with GHC 8.4 https://github.com/timbod7/haskell-chart/issues/181
         - TypeCompose < 0 # build failure with GHC 8.4 https://github.com/conal/TypeCompose/issues/6
-        - fb < 0 # build failure with GHC 8.4 https://github.com/psibi/fb/issues/3
+        # fb < 0 # build failure with GHC 8.4 https://github.com/psibi/fb/issues/3
         - heap < 0 # build failure with GHC 8.4 https://github.com/pruvisto/heap/issues/5
         - json-builder < 0 # build failure with GHC 8.4 https://github.com/lpsmith/json-builder/issues/2
         - text-format < 0 # build failure with GHC 8.4 https://github.com/bos/text-format/issues/22
@@ -3443,7 +3443,7 @@ packages:
         - cmark-highlight < 0 # GHC 8.4 via cmark
         - tasty-html < 0 # BuildFailureException Process exited with ExitFailure 1: ./Setup build
         - fingertree-psqueue < 0 # BuildFailureException Process exited with ExitFailure 1: ./Setup build
-        - yesod-fb < 0 # GHC 8.4 via fb
+        # yesod-fb < 0 # GHC 8.4 via fb
         - Spock-api < 0 # GHC 8.4 via reroute
         - Spock-core < 0 # GHC 8.4 via reroute
         - Spock-api-server < 0 # GHC 8.4 via Spock-api
@@ -3507,7 +3507,7 @@ packages:
         - wl-pprint-console < 0 # GHC 8.4 via colorful-monoids
         - groundhog-sqlite < 0 # GHC 8.4 via direct-sqlite
         - djinn-ghc < 0 # GHC 8.4 via djinn-lib
-        - yesod-auth-fb < 0 # GHC 8.4 via fb
+        # yesod-auth-fb < 0 # GHC 8.4 via fb
         - disposable < 0 # GHC 8.4 via ghcjs-base-stub
         - javascript-extras < 0 # GHC 8.4 via ghcjs-base-stub
         - axiom < 0 # GHC 8.4 via ghcjs-perch
@@ -3536,7 +3536,7 @@ packages:
         - elm-export < 0 # GHC 8.4 via wl-pprint-text
         - hsx-jmacro < 0 # GHC 8.4 via wl-pprint-text
         - jmacro < 0 # GHC 8.4 via wl-pprint-text
-        - yesod-auth-fb < 0 # GHC 8.4 via yesod-fb
+        # yesod-auth-fb < 0 # GHC 8.4 via yesod-fb
         - xturtle < 0 # GHC 8.4 via yjsvg
         - hindent < 0 # GHC 8.4 via descriptive
         - wai-middleware-crowd < 0 # GHC 8.4 via http-reverse-proxy