I was able to checkout GitHub - NixOS/mobile-nixos and build the default image in the git root and flash it to the phone. It boots NixOS but is stuck without ability to interact in any way besides triggering a shutdown.
Then I tried to build
enchilada flavor. I tried cross-compile on NixOS x86_64 and on NixOS aarch64-linux in a Hetzner VM. Build of master was failing. I guess i would require a working unique hash for an older state of the Nix store.
Unfortunately there are no pointers which release could be build successful before.
Anyone could point me to the necessary steps to have a image that boots with ssh support / desktop environment and touch keyboard?