Verified with 1:3.15.0-1ubuntu3.1 on Eoan: root@ee-valgrind:~# echo "deb http://ddebs.ubuntu.com $(lsb_release -cs) main restricted universe multiverse > deb http://ddebs.ubuntu.com $(lsb_release -cs)-updates main restricted universe multiverse > deb http://ddebs.ubuntu.com $(lsb_release -cs)-proposed main restricted universe multiverse" | \ > sudo tee -a /etc/apt/sources.list.d/ddebs.list deb http://ddebs.ubuntu.com eoan main restricted universe multiverse deb http://ddebs.ubuntu.com eoan-updates main restricted universe multiverse deb http://ddebs.ubuntu.com eoan-proposed main restricted universe multiverse root@ee-valgrind:~# sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys F2EDC64DC5AEE1F6B9C621F0C8CAB6595FDFF622 Executing: /tmp/apt-key-gpghome.p3fDDHpLDX/gpg.1.sh --keyserver keyserver.ubuntu.com --recv-keys F2EDC64DC5AEE1F6B9C621F0C8CAB6595FDFF622 gpg: key C8CAB6595FDFF622: 4 signatures not checked due to missing keys gpg: key C8CAB6595FDFF622: public key "Ubuntu Debug Symbol Archive Automatic Signing Key (2016)