I'm using Ubuntu 16.04 with Emacs 24.5

If I run:

M-x package-refresh-contents [RET]

I get back the message:

Contacting host: melpa.org:443

If I try to install this package with:

M-x package-install [RET] indium [RET]

I get back:

Package 'emacs-25' is unavailable
  • 1
    What Emacs version are you using? (Is it less than 25?)
    – npostavs
    Jul 20, 2017 at 13:10
  • @npostavs using 24 Jul 20, 2017 at 13:16

1 Answer 1


Evidentially the indium package has an explicit dependency on Emacs 25, and therefore you cannot install it on Emacs 24.

  • Actually, you should be able to install it if you run (add-to-list 'package--builtin-versions '(emacs 25)) first. Whether it will work is a different question.
    – Erik
    Jul 20, 2017 at 20:58
  • In general that sounds like a really bad idea :)
    – phils
    Jul 20, 2017 at 23:23

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