diff --git a/build-constraints.yaml b/build-constraints.yaml
index 8018e5ed..5546023e 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -131,6 +131,7 @@ packages:
         - safe-exceptions
         - monad-logger-syslog
         - fsnotify-conduit
+        - pid1
 
         - fsnotify
         - hinotify