OpenEmbedded "poky" with some sysmocom specific modifications. Mostly used only up to sysmocom release 201310, but the "pyro" branch is still used for 201705
As pointed out by Harald the PR is lower than the package
that is already on the device. Bump it to 6 then.
Current:
opkg list_installed | grep ntp
ntp - 4.2.8p1-r5.0
ntp-tickadj - 4.2.8p1-r5.0
ntpdate - 4.2.8p1-r5.0