diff --git a/build-constraints.yaml b/build-constraints.yaml
index 2b4c86db..ac8e3ef0 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1737,6 +1737,7 @@ packages:
 
     "Michael Walker <mike@barrucadu.co.uk> @barrucadu":
         - both
+        - concurrency
         - dpor
         - dejafu
         - async-dejafu
@@ -2450,6 +2451,9 @@ packages:
         - writer-cps-mtl
         - writer-cps-transformers
 
+    "Taras Serduke <taras.serduke@gmail.com> @tserduke":
+        - do-list
+
     # If you stop maintaining a package you can move it here.
     # It will then be disabled if it starts causing problems.
     # See https://github.com/fpco/stackage/issues/1056
@@ -2832,7 +2836,6 @@ expected-test-failures:
     - ListLike # No issue tracker, e-mail sent to maintainer
     - dbus # 0.10.12 No issue tracker, e-mail sent to maintainer
     - hspec-expectations-pretty-diff # GHC 8 issue not reported upstream since issue tracker disabled
-    - messagepack # 0.5.1 https://github.com/rodrigosetti/messagepack/issues/9
     - safecopy # time 1.6 https://github.com/acid-state/safecopy/issues/45
     - sourcemap # https://github.com/chrisdone/sourcemap/issues/3
     - swagger # GHC 8 bug? https://gitlab.com/twittner/swagger/issues/6