From 9a3029eecbcd7353bac090568b7b54cbac5e9b6c Mon Sep 17 00:00:00 2001
From: Dave Rolsky <autarch@urth.org>
Date: Sun, 13 Oct 2024 16:49:37 -0500
Subject: [PATCH] Clarify what runner images this action works with

---
 README.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/README.md b/README.md
index b15fa36..fc71076 100644
--- a/README.md
+++ b/README.md
@@ -59,6 +59,11 @@ jobs:
         if: matrix.toolchain == 'stable'
 ```
 
+Note that for Linux or BSD targets, you should always set the `runs-on` key to an x86-64
+architecture runner. If you want to do native ARM compilation, for example using
+`ubuntu-latest-arm`, then there's no point in using this action. This action is only tested on
+Ubuntu x86-64, Windows, and macOS runners.
+
 ## Input Parameters
 
 This action takes the following parameters: