diff --git a/build-constraints.yaml b/build-constraints.yaml
index e38a56d1..83f58f7e 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2229,7 +2229,7 @@ packages:
         - fmt
 
     "Takano Akio tak@anoak.io @takano-akio":
-        - fast-builder < 0 # GHC 8.4 via base-4.11.0.0
+        - fast-builder # 0 # GHC 8.4 via base-4.11.0.0
         - filelock
 
     "Brian Lewis brian@lorf.org @bsl":