diff --git a/build-constraints.yaml b/build-constraints.yaml
index 1e85d856..5cef45b8 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -690,7 +690,7 @@ packages:
         - ClustalParser
         - EntrezHTTP
         - Genbank
-        - RNAlien
+        # - RNAlien  # https://github.com/eggzilla/RNAlien/issues/8 (build failure)
         - Taxonomy
         # - TaxonomyTools # build failure
         - ViennaRNAParser