diff --git a/build-constraints.yaml b/build-constraints.yaml
index b2feaecc..d482ec3d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -53,6 +53,7 @@ packages:
         - hpc-coveralls
         - monad-unlift
         - yaml
+        - servius
 
     "FP Complete michael@fpcomplete.com @snoyberg":
         - alex