diff --git a/build-constraints.yaml b/build-constraints.yaml
index bcf6285d..545443e9 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -850,6 +850,9 @@ packages:
     "Greg V greg@unrelenting.technology @myfreeweb":
         - gitson
         - pcre-heavy
+        - http-link-header
+        - microformats2-parser
+        - hspec-expectations-pretty-diff
 
     "Francesco Mazzoli f@mazzo.li @bitonic":
         - language-c-quote