diff --git a/build-constraints.yaml b/build-constraints.yaml
index e1b31508..4b21a05d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3336,7 +3336,7 @@ packages:
 
     "Andrew Lelechenko <andrew.lelechenko@gmail.com> @Bodigrim":
         - exp-pairs
-        - fast-digits
+        - fast-digits < 0 # https://github.com/commercialhaskell/stackage/issues/6167
         - chimera
         - quadratic-irrational
         - primitive-addr