diff --git a/build-constraints.yaml b/build-constraints.yaml
index 438433da..11a4fe0b 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3975,3 +3975,8 @@ hide:
 - cryptohash-md5
 - cryptohash-sha1
 - cryptohash-sha256
+
+# Experimental: packages where Hackage cabal file revisions should be ignored.
+# Always use the cabal file shipped with the sdist tarball instead.
+no-revisions:
+- tls