Matt Armstrong <matt@rfc20.org> writes:

> X-debbugs-cc: Philip Kaludercic <philipk@posteo.net>, Stefan Monnier <monnier@iro.umontreal.ca>
>
> package.el provides `package-quickstart':
>
>     package-quickstart is a variable defined in ‘package.el’.
>
>     Its value is t
>     Original value was nil
>
>     Precompute activation actions to speed up startup.
>     This requires the use of ‘package-quickstart-refresh’ every time the
>     activations need to be changed, such as when ‘package-load-list’ is modified.
>
> This places a package-quickstart.elc file in `user-emacs-directory' that
> is loaded at startup, instead of loading the individual
> `user-emacs-directory'/elpa/*-autoloads.el files.
>
> In practice package.el takes care of calling
> `package-quickstart-refresh' as needed.  As a user making normal use of
> package.el I don't believe I have ever needed to call
> `package-quickstart-refresh' manually.
>
> I am playing with package-vc.el and immediately noticed that functions
> like `package-vc-install-from-checkout' and `package-vc-rebuild' do not
> call `package-quickstart-refresh'.
>
> The effect is that package-vc leaves a "stale" package-quickstart.elc in
> the `user-emacs-directory', and the user must run
> `package-quickstart-refresh' manually.
>
> Ideally the various `package-vc-*' functions take care of running the
> function when necessary.

The central function here is `package-vc--unpack-1' so the following
patch should take care of that: