add requirement

leftbyte · sipma · commit 9b401c008638 · 2026-01-12T13:03:31.000-08:00
diff --git a/README.md b/README.md
@@ -20,6 +20,8 @@ development and thus somewhat experimental.
 
 ### Requirements
 
+Ensure you have `zip` installed.
+
 The command-line interface requires python3.5 or higher.
 
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