diff --git a/build-constraints.yaml b/build-constraints.yaml
index d9390fd3..dca8bef1 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2068,7 +2068,7 @@ packages:
         # - webdriver-angular # via hspec-webdriver
 
     "Sven Heyll <svh@posteo.de> @sheyll":
-        - b9 < 0 # build failure with GHC 8.4 https://github.com/sheyll/b9-vm-image-builder/issues/4
+        - b9
         - type-spec
         - pretty-types