In reply to @saint._._. "What’s the main issue": I would recommend reading
this thread:

https://forum.nim-lang.org/t/13575

For starters, it actually seems to work.  Absolute biggest win is real ref
tracking and the hybrid central/local dependencies using git worktrees.  For me
personally, easy creation/use of per-project custom repositories, forge URLs,
package names that can include sub-directoy namespacing, e.g.
/vendor/mininim/core.  Conflict avoidance by not giving a shit what someone
called their nimble file and using the package repositories as the sole source
of truth for name => URL mappings.