diff --git a/README.md b/README.md
index beebcfde..2246fb8e 100644
--- a/README.md
+++ b/README.md
@@ -110,9 +110,13 @@ just i3 debug
 For macOS:
 
 ```bash
-# deploy harmonicia's configuration(macOS Intel)
+# deploy harmonica's configuration(macOS Intel)
 just ha
 
+# If you are deploying for the first time,
+# enter a shell with essential packages available
+# nix shell nixpkgs#just nixpkgs#git
+
 # deploy fern's configuration(Apple Silicon)
 just fe