diff --git a/build-constraints.yaml b/build-constraints.yaml
index bcc93f35..9932f13b 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -455,7 +455,8 @@ packages:
         - openpgp-asciiarmor
         - MusicBrainz
         - DAV
-        - hopenpgp-tools
+        # https://github.com/fpco/stackage/issues/319
+        # - hopenpgp-tools
 
     # https://github.com/fpco/stackage/issues/160
     "Ketil Malde":
@@ -636,12 +637,6 @@ packages:
         # https://github.com/fpco/stackage/issues/291
         - random < 1.0.1.3
 
-        # https://github.com/fpco/stackage/issues/318
-        - HaXml < 1.25
-
-        # https://github.com/fpco/stackage/issues/319
-        - polyparse < 1.10
-
         # https://github.com/fpco/stackage/issues/370
         - monad-control < 1
         - hasql < 0.5