boot.initrd.kernelModules overrides boot.initrd.availableKernelModules
and forces the initrd to load only those modules. This leads to the host
being unbootable in this case because of missing required modules.
availableKernelModules is the correct place for desired modules.
This got fixed during a debugging session of hensoko and teutat3s, but
not implemented in nix code until now.
Hendrik Sokolowski
teutat3s