diff --git a/build-constraints.yaml b/build-constraints.yaml
index c73e52c8..e2c513aa 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3643,6 +3643,9 @@ packages:
         # https://github.com/commercialhaskell/stackage/issues/3876
         - req < 1.2.0
 
+        # https://github.com/commercialhaskell/stackage/issues/3878
+        - microspec < 0.2
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of