Unable to verify myself, I don't have the means to test out the patched image. But I think this should work!

~haowenl please take a look

Sorry, screwed up the ticket name. It was meant to be "ubuntu/20.04: unable to import more than one custom repository"

Opening a ticket as requested by ~sircmpwn.

An example of a failed build: https://builds.sr.ht/~ashpool/job/748383
A similar manifesto built successfully on debian/bullseye: https://builds.sr.ht/~ashpool/job/748419

Warnings of interest:

W: Skipping acquire of configured file
'maindeb-src/binary-amd64/Packages' as repository
'https://ppa.launchpadcontent.net/ansible/ansible/ubuntu focal
InRelease' doesn't have the component 'maindeb-src' (component misspelt
in sources.list?)
...
W: Skipping acquire of configured file 'focal/binary-amd64/Packages' as
repository 'https://ppa.launchpadcontent.net/ansible/ansible/ubuntu
focal InRelease' doesn't have the component 'focal' (component misspelt
in sources.list?)

Error message:

E: Unable to locate package terraform
[#748383] 2022/05/01 17:16:49 Build failed.

Interestingly, the build succeeds if only one custom repo is added: https://builds.sr.ht/~ashpool/job/748358 (the manifesto is otherwise identical). The warnings "Skipping acquire of configured file" are still present, but the package is installed successfully.