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sudo gpg --keyserver keyserver.ubuntu.com --recv-keys  2E0CC76D
sudo gpg -a --export 2E0CC76D > 2E0CC76D.key
sudo gpg --no-default-keyring --keyring ./2E0CC76D.gpg --import 2E0CC76D.key
cp 2E0CC76D.gpg squashfs-root/etc/apt/trusted.gpg.d/
echo 'deb http://ppa.launchpad.net/philroche/philroche-staging/ubuntu yakkety main' > squashfs-root/etc/apt/sources.list.d/philroche-staging.list
sudo chroot squashfs-root/ apt-get update