RASPBIAN STRETCH update from v3 to v5

[TimothyFehr]

Hello, I have a fresh install of RASPBIAN STRETCH, and wanted to reuse my old pi-hat, now in stretch it does not detect the hat as a bluetoth device. the driver version is 0.3 but the update commands do not work (in this OS version at least). Do you have some advice for me on how to fix that?

it seams that all the build files are not existing (where ever they should be)

thanks in advance