rock64@rock64:~$ sudo apt update && sudo apt upgrade
Hit:1 http://ports.ubuntu.com/ubuntu-ports xenial InRelease
Hit:2 http://ppa.launchpad.net/ayufan/rock64-ppa/ubuntu xenial InRelease
Get:3 http://ports.ubuntu.com/ubuntu-ports xenial-security InRelease [107 kB]
Get:4 http://deb.ayufan.eu/orgs/ayufan-rock64/releases  InRelease [1,335 B]
Get:5 http://ports.ubuntu.com/ubuntu-ports xenial-updates InRelease [109 kB]
Get:6 http://ports.ubuntu.com/ubuntu-ports xenial-security/main Sources [139 kB]
Get:7 http://ports.ubuntu.com/ubuntu-ports xenial-security/main arm64 Packages [408 kB]
Get:8 http://ports.ubuntu.com/ubuntu-ports xenial-updates/main arm64 Packages [680 kB]
Get:9 http://ports.ubuntu.com/ubuntu-ports xenial-updates/universe arm64 Packages [636 kB]
Fetched 2,081 kB in 2s (870 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
2 packages can be upgraded. Run 'apt list --upgradable' to see them.
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages were automatically installed and are no longer required:
  libllvm4.0 libllvm5.0 libqmi-glib1
Use 'sudo apt autoremove' to remove them.
The following packages have been kept back:
  linux-rock64 linux-rock64-package
0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.
rock64@rock64:~$ sudo apt install  linux-rock64 linux-rock64-package
[sudo] password for rock64:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 linux-rock64 : Depends: board-package-rock64-0.7-30 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
rock64@rock64:~$ sudo apt-get install board-package-rock64-0.7-30