Add more installation details

diff --git a/README.md b/README.md
index 58000bd..6d2a855 100644 (file)
--- a/README.md
+++ b/README.md
@@ -18,7 +18,9 @@ instructions
 [Racket](https://download.racket-lang.org/)
 
 ### installation
-`make install` or `raco pkg install`
+1. Run `make install` or `raco pkg install`
+2. Add `$HOME/.racket/7.9/bin` to your `$PATH`
+   (replacing `7.9` with whatever version you have installed)
 
 ### usage
 `tt (FOLLOW-FILE)`