failed to build trusty-powerpc:

[vicamo]

See https://github.com/vicamo/docker-brew-ubuntu-debootstrap/actions/runs/8967583990/job/24627934028:

I: Base system installed successfully.
+ debuerreotype-minimizing-config /tmp/debuerreotype.trusty.soA9QIUfFJ/rootfs
+ tee /tmp/debuerreotype.trusty.soA9QIUfFJ/rootfs/etc/apt/sources.list
deb http://ports.ubuntu.com/ubuntu-ports trusty main restricted universe multiverse
deb http://ports.ubuntu.com/ubuntu-ports trusty-updates main restricted universe multiverse
+ debuerreotype-apt-get /tmp/debuerreotype.trusty.soA9QIUfFJ/rootfs update -q
deb http://ports.ubuntu.com/ubuntu-ports trusty-backports main restricted universe multiverse
deb http://ports.ubuntu.com/ubuntu-ports trusty-security main restricted universe multiverse
...
Fetched 9489 kB in 7s (1265 kB/s)
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/trusty-updates/InRelease  Unable to find expected entry 'main/binary-powerpc/Packages' in Release file (Wrong sources.list entry or malformed file)

W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/trusty-security/InRelease  Unable to find expected entry 'main/binary-powerpc/Packages' in Release file (Wrong sources.list entry or malformed file)

E: Some index files failed to download. They have been ignored, or old ones used instead.

There is no more powerpc arch in aforementioned InRelease files.