There was a superfluous adding of the string "/dev/" to the output path for the manual instructions to dd the new kernel in place.
Old erroneous behavious for reference:
```
6/8) Aktualisiere linux-peach [############################################################] 100%
>>> Updating module dependencies. Please wait ...
A new kernel version needs to be flashed onto /dev/mmcblk0p1.
Do you want to do this now? [y|N]
N
You can do this later by running:
# dd if=/boot/vmlinux.kpart of=/dev//dev/mmcblk0p1
```