bug#58760: Guix System iso too big for cdrom again

[Csepp <raingloom@riseup.net>]

"pelzflorian (Florian Pelz)" <pelzflorian@pelzflorian.de> writes:

> Hello Guix,
>
> thanks to commit
>
> commit 26c1bd9dfafb5a954d2174b7a000304cd7ae6345
> Author: Tobias Geerinckx-Rice <me@tobias.gr>
> Date:   Mon Apr 6 17:48:21 2020 +0200
>
>     vm: Transparently compress iso9660 images.
>     
>     * gnu/build/vm.scm (make-iso9660-image): Use the ‘--zisofs’ xorriso
>     filter at the highest compression settings for supported directories.
>
> it was possible to burn the Guix System install image to a 700MB CD.
> But it fits no more.  I compared using the du tool (comparison between
> good old Guix version e427593 and bad new Guix version 3734857f (with
> unmerged installer patches) is attached).  The result is that most
> packages got slightly bigger and this broke the camel’s back.  From what
> Tobias (Cc) wrote, he used the highest compression settings.
>
> So it seems nothing can be done to make the install iso smaller than
> 700MB and support this antiquated storage medium, but I thought I’d open
> a bug and ask, because my laptop doesn’t boot from USB, I have more
> CD/Rs than DVD/Rs and I guess they are cheaper than DVD.
>
> Regards,
> Florian
>
> [2. text/plain; install-image-du-commit-e427593]...
>
> [3. text/plain; install-image-du-commit-3734857f]...
>
> [4. text/plain; install-image-du-comparison]...

Are there unnecessary dependencies that could be cut out?