I used koha-testing-docker on Windows 10 for a while and then it stopped working for me altogether: https://gitlab.com/koha-community/koha-testing-docker/issues/140
1. I had to switch the distribution to https://app.vagrantup.com/digital-port/boxes/debian-stretch64 because otherwise I was hitting the missing linux-headers for vbox guest additions.
I switched back to kohadevbox and got it working after some wrangling, but a few days ago it stopped working too. Now I'm seeing what I think you're seeing too: E: Unable to locate package linux-headers-4.9.0-9-amd64 E: Couldn't find any package by glob 'linux-headers-4.9.0-9-amd64' E: Couldn't find any package by regex 'linux-headers-4.9.0-9-amd64' I should have kept better notes about how I got my devbox working before, but it's confusing that it would simply stop working. -- Owen -- Web Developer Athens County Public Libraries (740) 737-6006 https://www.myacpl.org