Unpacking lockfiles in different package managers

[John Gilmore]

Is "lockfile" an appropriate term to use for these files?

I think of a lockfile as something that avoids race conditions among
multiple concurrent processes.  As in Wikipedia:

  https://en.wikipedia.org/wiki/File_locking#Lock_files

In this repro discussion, a "lockfile" seems to perhaps be "locking" a
library reference in a compilation to a particular version of that
library (and sometimes with a particular checksum on that library's
source code?).  That is an unusual use of the term "lockfile".  I
wonder if we could consider adopting a less confusing term.

Thanks!

	John