Oops. That wasn't very readable. I'm not sure what happened. Trying again:
What I spot:
0 > mount-root : mount-root ( Empty ) 00000000ffe35d28: boot-dev$ ( ffe357a8 6 ) 00000000ffe35d30: fs-pkg$ ( ffe357a8 6 ffe317c0 10 ) 00000000ffe35d38: $open-package
It looks like fs-pkg$ names the package it's opening. I'm guessing that's hsfs-file-system, but you should probably verify that's what is in that string (do a "2dup type" before calling $open-package). If that's correct, then rather than descending into open-package, you probably want to put a breakpoint at "open" in /packages/hsfs-file-system, which is where that will end up after much wandering around. Then proceed from there - you really don't want to trace through instance creation.