diff --git a/README.md b/README.md
index add62d6..fc14daf 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,7 @@ In all cases, `manual-approval` will close the initial GitHub issue.
 
 🚫 Unsupported
 - Windows/amd64 — 64-bit Windows systems are currently not supported.
+- Non-Linux GitHub-hosted runners of any architecture.
 
 ## Usage