diff --git a/build-constraints.yaml b/build-constraints.yaml
index feaf02c3..05a75e23 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1433,7 +1433,7 @@ packages:
         - generic-aeson
         - primitive-extras
         - monad-primitive
-        - primitive-unlifted
+        - primitive-unlifted < 0.2
         - mwc-random-monad
         - stm-hamt
         - stm-containers # 0 # https://github.com/commercialhaskell/stackage/pull/5289#issuecomment-610353366