diff --git a/build-constraints.yaml b/build-constraints.yaml
index e097c527..4780d38b 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -5211,8 +5211,6 @@ packages:
         - fmt < 0 # via interpolate
         - generics-eot < 0 # via interpolate
         - mwc-probability-transition < 0 # via logging-effect
-        - incremental-parser < 0 # via monoid-subclasses
-        - timerep < 0 # via monoid-subclasses
         - hschema < 0 # via natural-transformation
         - hschema-prettyprinter < 0 # via natural-transformation
         - asciidiagram < 0 # via pandoc-types
@@ -6340,9 +6338,6 @@ expected-test-failures:
     # https://github.com/alphaHeavy/lzma-conduit/issues/19
     - lzma-conduit
 
-    # https://github.com/blamario/monoid-subclasses/issues/18
-    - monoid-subclasses
-
     # https://github.com/Bodigrim/exp-pairs/issues/16
     - exp-pairs