(There are some similar-sounding issues, but they're talking about sharing global packages across different versions rather than installing them per-version.)

It'd be nice to be able to automatically (re-)install a list of global packages when a new version is installed as can be done via the default-packages file in nvm:

If you have a list of default packages you want installed every time you install a new version we support that too. You can add anything npm would accept as a package argument on the command line.

e.g.:

$ cat $NVM_DIR/default-packages

jay-repl
tmpin
web-ext

Or, failing that, some kind of post-install hook?