diff --git a/build-constraints.yaml b/build-constraints.yaml
index 706205d6..e34d822d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -217,7 +217,7 @@ packages:
     "Richard Cook <rcook@rcook.org> @rcook":
         - hidden-char
         - oset
-        - req-url-extra
+        - req-url-extra < 0 # https://github.com/rcook/req-url-extra/issues/1
         - sexpr-parser
 
     "Vanessa McHale <tmchale@wisc.edu> @vmchale":