a) To compile a local checked out hyperion.ng repository in a docker container, I tested a while ago.
Here is is modified script https://ufile.io/gtt43pv1
The problem with this script is that it assumes that all the dependencies are already present in the image, which is what caused me some consternation trying to get a build going.
Would you mind sharing the hyperion.ng documentation sites which still makes references to QT4?
That would get us in the position to have it fixed....
Well, this is quite embarrassing - I think the QT4 lib errors were from an older build. However, the current debian package control file does not specify any dependencies, so installing it does not prompt to install the required libs. Also, the version number in the control file for the betas is just 2.0.0 with no suffix, which means that upgrades won't work from a repository.