From 961a48c89efb1af5477fa8054eec994d50557875 Mon Sep 17 00:00:00 2001
From: Bela Stoyan <bela.stoyan@gmail.com>
Date: Sun, 28 Jan 2024 23:26:29 +0100
Subject: [PATCH] add gnused warning

---
 README.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/README.md b/README.md
index 5298f08..4789d6f 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,9 @@
 
 This is a template for our pre-commit mirrors.
 
+> [!WARNING]  
+> This template expects `sed` in your $PATH to be GNU sed. If you are on macOS, you can ensure this by running inside a conda environment with `sed` installed.
+
 To create a new mirror, you can run the following command
 
 ```bash