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diff --git a/readme.md b/readme.md
index 11e4ecb..2dd6c7b 100644
--- a/readme.md
+++ b/readme.md
@@ -33,6 +33,7 @@ make run
 ```
 
 When changing code, use `make watch` to re-build things automatically as needed.
+(run `cargo install systemfd cargo-watch` if needed)
 
 If you use this project or have any suggestions, please
 [contact me](https://metamuffin.org/contact)