Original failing build: https://launchpad.net/~kubuntu-ppa/+archive/ubuntu/staging-kdeapplications/+sourcepub/7361168/+listing-archive-extra
Retested in staging area ppa builds, and was also successful in distribution package upload.
Ref: https://launchpad.net/ubuntu/+source/ksirk/4:16.12.1-0ubuntu1