For anyone else wondering why the link doesn't work... it's because the daily netboot images are broken atm, so the linked folder doesn't even exist. 
As of right now (1st of May, 2020), the below daily build, rather than the latest one, is the one to use (build wise, anyway).
https://d-i.debian.org/daily-images/arm6...rd-images/
And how to use the images?
1) Download the firmware file that suits your board - pine64-plus, pinebook, rock64, rockpro64 or pinebookpro.
2) Download the installer partition
3) Mash the two together
4) Write them to a microSD
5) Give it a try!
For the pinebook pro, that could look something like (although I actually used the 20200430-02:15 build, not the daily, again, since it's missing atm - betcha it'll be back again tomorrow!):
Note: ALWAYS double check your of= path before using dd, otherwise you might overwrite something you didn't mean to!
As of right now (1st of May, 2020), the below daily build, rather than the latest one, is the one to use (build wise, anyway).
https://d-i.debian.org/daily-images/arm6...rd-images/
And how to use the images?
1) Download the firmware file that suits your board - pine64-plus, pinebook, rock64, rockpro64 or pinebookpro.
2) Download the installer partition
3) Mash the two together
4) Write them to a microSD
5) Give it a try!
For the pinebook pro, that could look something like (although I actually used the 20200430-02:15 build, not the daily, again, since it's missing atm - betcha it'll be back again tomorrow!):
Code:
wget https://d-i.debian.org/daily-images/arm64/daily/netboot/SD-card-images/partition.img.gz
wget https://d-i.debian.org/daily-images/arm64/daily/netboot/SD-card-images/firmware.pinebook-pro-rk3399.img.gz
zcat firmware.pinebook-pro-rk3399.img.gz partition.img.gz > pinebookpro-debian-installer.img
dd if=pinebookpro-debian-installer.img of=/dev/mmcblk0 bs=1M status=progressNote: ALWAYS double check your of= path before using dd, otherwise you might overwrite something you didn't mean to!
