Hello there,
While trying to build this tool for potential addition to the Blackarch Linux repositories, I encountered the following issue:
==> Starting build()...
    Updating crates.io index
error: no matching package named `differ` found
location searched: registry `crates-io`
required by package `pathbuster v0.5.5 (/build/pathbuster/src/pathbuster)`
 
It seems the differ crate is no longer available as per this issue advised.
Cheers & thanks.