Looks like DigitalOcean changed some filesystem settings

[obadz]

I recently got this error:

Nov 05 15:46:50 stage-1-init: [fsck.ext4 (1) -- /mnt-root/] fsck.ext4 -a /dev/vda1
Nov 05 15:46:50 stage-1-init: /dev/vda1 has unsupported feature(s): metadata_csum
Nov 05 15:46:50 stage-1-init: e2fsck: Get a newer version of e2fsck!
Nov 05 15:46:50 stage-1-init: fsck on /dev/vda1 failed.
Nov 05 15:46:50 stage-1-init: An error occurred in stage 1 of the boot process, which must mount the
Nov 05 15:46:50 stage-1-init: root filesystem on `/mnt-root' and then start stage 2.  Press one
Nov 05 15:46:50 stage-1-init: of the following keys:
Nov 05 15:46:50 stage-1-init: r) to reboot immediately
Nov 05 15:46:50 stage-1-init: *) to ignore the error and continue

Also the DNS server wasn't set right.

[obadz]

Looks like NixOS/nixpkgs#20397 fixed this