Subject: bug#46482: [core-updates] u-boot source cannot be downloaded

From: Danny Milosavljevic <[email-masked]>
Date: Sat, 13 Feb 2021 03:37:52 +0100

failed to download "/gnu/store/1idpm6f9pcm9dajm90qgk6x1r6qywfv8-u-boot-2021.01.tar.bz2" from "ftp://ftp.denx.de/pub/u-boot/u-boot-2021.01.tar.bz2"
builder for `/gnu/store/5s92y4l66f8qh4p4gx79jvsjaxhl208k-u-boot-2021.01.tar.bz2.drv' failed to produce output path `/gnu/store/1idpm6f9pcm9dajm90qgk6x1r6qywfv8-u-boot-2021.01.tar.bz2'
build of /gnu/store/5s92y4l66f8qh4p4gx79jvsjaxhl208k-u-boot-2021.01.tar.bz2.drv failed
View build log at '/var/log/guix/drvs/5s/92y4l66f8qh4p4gx79jvsjaxhl208k-u-boot-2021.01.tar.bz2.drv.bz2'.
cannot build derivation `/gnu/store/m09apasn4glhf2lvsq8bn2ci5ncjq0fz-u-boot-tools-2021.01.drv': 1 dependencies couldn't be built
building /gnu/store/5s4pczxlp3v8yfavmgjf93093msfaxym-ucommon-7.0.0.tar.gz.drv...

Changing the URL to "https" instead of "ftp" would work.
Changing it to "http" instead of "ftp" would also work.
Which should we use?

Reason is bug #46481.

But do we maybe want to change over to http or https anyway?