diff --git a/build-constraints.yaml b/build-constraints.yaml
index af7add6c..5b2bb977 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1649,6 +1649,9 @@ packages:
 
     "Alois Cochard <alois.cochard@gmail.com> @aloiscochard":
         - machines-binary
+        - machines-directory
+        - machines-io
+        - machines-process
         # on behalf of Bryan O'Sullivan @bos:
         - wreq