ruby-premailer build failure in salsa ci

[Pirate Praveen]

It fails with error,

Encoding::InvalidByteSequenceError: "\xE2" on US-ASCII
full log 
<https://salsa.debian.org/ruby-team/ruby-premailer/-/jobs/276596>

Though it built fine in sbuild. I think salsa ci should use sbuild or 
same settings as sbuild.