diff --git a/build-constraints.yaml b/build-constraints.yaml
index dfdfce3f..604c056e 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -294,7 +294,7 @@ packages:
     "Michael Snoyman michael@snoyman.com @snoyberg":
         - bzlib-conduit
         - cabal-install
-        - mega-sdist
+        # - mega-sdist  # https://github.com/snoyberg/mega-sdist/issues/4
         - case-insensitive
         - classy-prelude-yesod
         - conduit-combinators
@@ -523,7 +523,7 @@ packages:
         - wrap
         - path
         - weigh
-        - structured-haskell-mode
+        # - structured-haskell-mode  # https://github.com/chrisdone/structured-haskell-mode/issues/156
 
     "Alberto G. Corona <agocorona@gmail.com> @agocorona":
         - RefSerialize
@@ -2805,7 +2805,7 @@ packages:
     "aiya000 <aiya000.develop@gmail.com> @aiya000":
         - stack-type
         - throwable-exceptions
-        - snowtify
+        # - snowtify  # https://github.com/aiya000/hs-snowtify/issues/1
 
     "Mitsutoshi Aoe <maoe@foldr.in> @maoe":
         - influxdb