diff --git a/build-constraints.yaml b/build-constraints.yaml
index 13b55a4c..4861aba4 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -646,6 +646,11 @@ packages:
     "Aleksey Kliger aleksey@lambdageek.org @lambdageek":
         - unbound-generics
 
+    "Alois Cochard alois.cochard@gmail.com @aloiscochard":
+        - machines-directory
+        - machines-io
+        - machines-process
+
     "Stackage upper bounds":
 
         # Force a specific version that's compatible with transformers 0.3