post_install() {
  echo "Your installation of blt4l is not yet done!
You'll need to set launch options in Steam for Payday 2:
LD_PRELOAD=\"\$LD_PRELOAD /usr/lib/blt4l/libblt_loader.so\" %command%
And install the base Lua code, instructions here:
https://github.com/blt4linux/blt4l"
}