diff --git a/build-constraints.yaml b/build-constraints.yaml
index 44cb886a..f9d7ecd8 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -484,7 +484,8 @@ packages:
         - yesod-table
 
     "Chris Allen <cma@bitemyapp.com> bitemyapp":
-        []
+        - machines-directory
+        - machines-io
         # - bloodhound # haskell-src-exts 1.18 via derive
 
     "Adam Bergmark <adam@bergmark.nl> @bergmark":
@@ -885,8 +886,6 @@ packages:
         []
         # GHC 8 & bounds - codex
         # GHC 8 - machines-binary
-        # GHC 8 - machines-directory
-        # bounds - machines-io
         # GHC 8 - machines-process
         # GHC 8 - sarsi
         # - wreq # BLOCKED http-lient 0.5 # on behalf of Bryan O'Sullivan @bos