add config.wip.fs.temproot.remote.type == none, add config.wip.base.includeInputs, add pkgs.uboot-with-mmc-env, rename config.preface to config.wip.preface
do partitioning during build instead of install, fix qemu's efi vars, add config.wip.dropbear.hostKeys
ZFS, encryption (keys, keystore, LUKS), bootFS, ephemeral root (tmpfs, ZFS, F2FS, ...), testing in qemu, options & debugging, ... and many small things
make system's $out/config optional, don't use patches by default