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+# pda build:
+rootfs builds (from x86), but img doesn't build:
+```sh
+$ tail nix log /nix/store/abal7aq9vcbcrpk55n4qzy1g1165yzmb-nixos-disk-image.drv
+[    1.889235] EXT4-fs (vda2): mounted filesystem with ordered data mode. Opts:
+[    2.432144] random: fast init done
+[   14.036820] random: crng init done
+[   59.086567] reboot: Restarting system
+WARNING: Image format was not specified for 'nixos.raw' and probing guessed raw.
+         Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted.
+         Specify the 'raw' format explicitly to remove the restrictions.
+kvm version too old
+.qemu-system-aarch64-wrapped: failed to initialize kvm: Function not implemented
+```
+
+consider looking at the official mobile-nixos image target to see how it works.
+
+
+# features/tweaks
+- enable sshfs (deskto/lappy)
+- enable ddclient (uninsane)
+- configure hostnames
+- set firefox default search engine
+- disable gnome auto-sleep/lock