Requirements Environment variables RELEASE: an ubuntu release, e.g., trusty KERNEL: a kernel release that is supported on ${RELEASE}, e.g., xenial MAINTAINER, EMAIL: the name and e-mail address to sign the source package with PPA: the Launchpad PPA to which the source package will be uploaded VERSION_SUFFIX: a string to append to the latest Ubuntu kernel release, e.g., +debug1 Launchpad access a GPG key with the name ${MAINTAINER} <${EMAIL}>, with no passphrase the GPG key added to your Launchpad profile a Launchpad PPA you have access to under ${PPA}