message: Minor build doc fix to be more complete.
  See
diff: @@ -52,10 +52,10 @@ on!
  ## Debian
  -Very easy, just install `libasound2` and `libsdl2` dev packages:
  +Very easy, just install the required dev packages:
  ```sh
  -apt install libasound2-dev libsdl2-dev
  +apt install libasound2-dev libsdl2-dev pkg-config
  ```
  Then you should be able to build with `cargo run`
  