Add Racket install instructions for a couple of pkg managers

diff --git a/README.md b/README.md
index 4ad9649..b6cb42e 100644 (file)
--- a/README.md
+++ b/README.md
@@ -22,8 +22,14 @@ instructions
 ------------
 
 ### requirements
+
+#### manual
 [Racket](https://download.racket-lang.org/)
 
+#### package manager
+- Void Linux: `xbps-install racket`
+- Debian: `apt install racket`
+
 ### installation
 `make build && make install` will build and copy `tt` binary into `$PREFIX/bin`.