diff --git a/build-constraints.yaml b/build-constraints.yaml
index 688e1ae2..4076bbfa 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -27,10 +27,10 @@ packages:
     "Michael Snoyman michael@snoyman.com @snoyberg":
         - bzlib-conduit
         - cabal-install
-        # GHC 8 - cabal-src
+        - cabal-src
         - case-insensitive
-        # GHC 8 - classy-prelude-yesod
-        # GHC 8 - conduit-combinators
+        - classy-prelude-yesod
+        - conduit-combinators
         - conduit-extra
         - hebrew-time
         - keter
@@ -50,7 +50,7 @@ packages:
         - yackage
         - yesod
         - yesod-auth
-        # GHC 8 - authenticate-oauth
+        - authenticate-oauth
         - yesod-bin
         - yesod-eventsource
         # GHC 8 - yesod-fay
@@ -59,14 +59,14 @@ packages:
         - yesod-sitemap
         - yesod-static
         - yesod-test
-        # GHC 8 - yesod-websockets
+        - yesod-websockets
         - cereal-conduit
         # GHC 8 - binary-conduit
         # GHC 8 - lzma-conduit
-        # GHC 8 - mutable-containers
+        - mutable-containers
         - hpc-coveralls
         - monad-unlift
-        # GHC 8 - monad-unlift-ref
+        - monad-unlift-ref
         - yaml
         - servius
         - cryptonite-conduit