diff --git a/build-constraints.yaml b/build-constraints.yaml
index e5502f41..04ab1f6d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1724,7 +1724,7 @@ packages:
     "Fumiaki Kinoshita <fumiexcel@gmail.com> @fumieval":
         - boundingboxes
         - control-bool
-        - extensible
+        # extensible, https://github.com/fumieval/extensible/issues/12
         - monad-skeleton
         - objective
         - witherable
@@ -4033,9 +4033,6 @@ skipped-benchmarks:
     # https://github.com/haskell-works/hw-bits/issues/8
     - hw-bits
 
-    # freer-effects compilation failure
-    - extensible
-
 # end of skipped-benchmarks
 
 
@@ -4159,6 +4156,7 @@ tell-me-when-its-released:
 - cryptohash-md5-0.11.100.1 # re-enable benchmarks, https://github.com/fpco/stackage/issues/2538#issuecomment-304458844
 - cryptohash-sha1-0.11.100.1 # re-enable benchmarks, https://github.com/fpco/stackage/issues/2538#issuecomment-304458844
 - cryptohash-sha256-0.11.100.1 # re-enable benchmarks, https://github.com/fpco/stackage/issues/2538#issuecomment-304458844
+- freer-effects-0.3.0.1 # re-enable extensible, https://github.com/fumieval/extensible/issues/12
 
 # Packages which should be hidden after registering, to avoid module name
 # conflicts. This is intended for at least two use cases: