diff --git a/build-constraints.yaml b/build-constraints.yaml
index 1c53f971..30920845 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -339,7 +339,7 @@ packages:
 
     "Matthew Ahrens <matt.p.ahrens@gmail.com> @mpahrens":
         - forkable-monad
-        - butter < 0 # 0.1.0.6 text 1.2.5.0 exports `elem`
+        - butter < 0 # 0.1.0.6 text 1.2.5.0 exports `elem` https://github.com/System-Indystress/Butter/issues/4
 
     "Iris Ward <aditu.venyhandottir@gmail.com> @AdituV":
         - typenums
@@ -616,7 +616,7 @@ packages:
         - resistor-cube
         - linear-circuit
         # Not a maintainer
-        - cabal-plan < 0 # 0.7.3.0, which is the release compatible with semialign-1.3, requires base-compat-0.13 which we don't have yet, see #6906
+        - cabal-plan
         - topograph
         - ix-shapable
         - hsshellscript < 0 # 3.5.0 compile fail https://github.com/commercialhaskell/stackage/issues/6762