Getting error while importing downloaded github project (scala)? - scala

Question

So I'm pretty new at scala. I'm trying to use this library in my other project: https://www.github.com/desmondyeung/scala-hashing
I downloaded it, and looked up a guide on how to use downloaded projects (https://www.oreilly.com/library/view/scala-cookbook/9781449340292/ch18s11.html), and it said to make a build.scala and then put some such in it. The way I've tried to do that is this:
import sbt._
object MyBuild extends Build {
lazy val root = Project("root", file(".")) dependsOn(xxHash)
lazy val xxHash = RootProject(uri("file:///Users/[other stuff]/documents/GitHub/scala-hashing-master/project"))
}
And that's all that's in that build.scala file. It's under the project folder.
I tried to run it using some simple test code:
import xxHash._
object hashtest {
def main(): Unit = {
println(XxHash.com.desmondyeung.hashing.Xxhash64.hashByteArray(Array[Byte](xs = 123), seed = 0))
}
}
But I'm getting an error, it says "not found: object xxHash". I must be missing something, because the guide doesn't tell me how to reference it I don't think? I tried just using import com.desmondyeung.hashing.XxHash64 but it didn't work either, saying object desmondyeung is not a member of package com
I googled that, and it said to try putting _root_ before .com, but that did not work.