Calibre headless on a ARM device/what is needed to run recipes?

Ideally, I would like to automatize downloading certain recipes so that my computer where calibre is installed would not have to be used at all. I would not mind alternatives to calibre that can run Calibre recipes, but I am not sure anything like that exists.

I have a lede/openwrt server at home and I would like to install calibre on it. However, it seems complicated. First, the server has ARM architecture, so I would need to compile it myself. Then it seems I need QT (which is not compiled for LEDE) even though I would not be running any of the GUI stuff.

Has anyone found a way to do this? I have seen a lot of people interested in running calibre headless on ARM.