diff --git a/build-constraints.yaml b/build-constraints.yaml
index af3a8f4a..c68e3597 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -33,7 +33,7 @@ packages:
         - yackage
         - yesod
         - yesod-auth
-        # aeson < 0.10
+        # aeson < 0.10 & http-types < 0.9
         # - yesod-auth-oauth2
         - yesod-auth-deskcom
         - authenticate-oauth
@@ -179,7 +179,8 @@ packages:
     "Jasper Van der Jeugt":
         - blaze-html
         - blaze-markup
-        - hakyll
+        # http-types < 0.9
+        # - hakyll
         - stylish-haskell
         - psqueues
         - websockets
@@ -389,7 +390,7 @@ packages:
     "Patrick Brisbin":
         - gravatar
 
-    # aeson < 0.10
+    # aeson < 0.10 & http-types < 0.9
     # "Paul Harper <benekastah@gmail.com>":
         # - yesod-auth-oauth2
 
@@ -411,7 +412,8 @@ packages:
         - yesod-auth-account-fork
         - yesod-auth-fb
         - yesod-fb
-        - yesod-mangopay
+        # http-types < 0.9
+        # - yesod-mangopay
 
     "Alexander Altman <alexanderaltman@me.com>":
         - base-unicode-symbols
@@ -426,7 +428,8 @@ packages:
         - dixi
         - latex-formulae-image
         - latex-formulae-pandoc
-        - latex-formulae-hakyll
+        # http-types < 0.9
+        # - latex-formulae-hakyll
         # Temporarily removed due to upper bound on haskell-src-exts in Agda
         # - agda-snippets
         # - agda-snippets-hakyll
@@ -860,7 +863,6 @@ packages:
         - network-simple
         # aeson < 0.10
         # - pipes-aeson
-        - pipes-aeson < 0
         - pipes-attoparsec
         - pipes-binary
         - pipes-network
@@ -1578,9 +1580,10 @@ packages:
         - filecache
         - pcre-utils
         - strict-base-types
-        - stm-firehose
-        - hslogstash
         - withdependencies
+        # http-types < 0.9
+        # - stm-firehose
+        # - hslogstash
 
     "Mark Karpov <markkarpov@opmbx.org> @mrkkrp":
         - megaparsec
@@ -1748,8 +1751,9 @@ packages:
     "Timothy Klim <stackage@timothyklim.com> @TimothyKlim":
         - pkcs10
 
-    "Jeremy Shaw <jeremy@n-heptane.com> @stepcut":
-        - userid
+    # http-types < 0.9
+    # "Jeremy Shaw <jeremy@n-heptane.com> @stepcut":
+    #   - userid
 
     "Stackage upper bounds":
         # https://github.com/fpco/stackage/issues/537
@@ -1758,9 +1762,6 @@ packages:
         # https://github.com/GaloisInc/cryptol/issues/275
         - sbv < 5.0
 
-        # https://github.com/fpco/stackage/issues/880
-        - http-types < 0.9
-
         # https://github.com/fpco/stackage/issues/908
         - bimap < 0.3.1