bug#53805: 27.2; NonGNU ELPA: helm does not install dependencies

[Xingyu Pu]

When installing helm from the NonGNU ELPA, packages that helm requires
is not installed.

Step to reproduce:

Add nongnu repository to package-archives.
List packages by M-x list-packages.
Select helm from nongnu and install.
Package helm-core, async, popup that helm requires is not installed.

This is tested with Emacs -Q.

This is the relevant recipes copied from
"~/.emacs.d/elpa/archives/nongnu/archive-contents".
The dependecy variable is nil.
 (helm .
       [(3 6 2)
nil "Emacs incremental and narrowing framework" tar
((:url . "https://github.com/emacs-helm/helm";)
(:maintainer "Thierry Volpiatto" . "thierry.volpiatto@gmail.com")
(:authors
  ("Thierry Volpiatto" . "thierry.volpiatto@gmail.com"))
(:commit . "4ff354efb6b24044fd38b725b61d470bd5423265"))])