Nixpkgs master breaks nixops #34253
Description
Issue description
With nixops being:
/run/current-system/sw/bin/nixops: symbolic link to /nix/store/nm6iyrkjxyrz2br1cv8fiap9rwpj3cqy-nixops-1.5.1/bin/nixops
using the master branch of nixpkgs, the following failure output appears with deployment target libvirtd.
keepalive.> mounting Nix store...
keepalive.> mounting host's temporary directory...
keepalive.> starting stage 2 (/nix/store/9ksdkg15y6k620xzlch8w5vkjvvlj09m-vm-run-stage2)
keepalive.> Information: You may need to update /etc/fstab.
keepalive.>
Information: You may need to update /etc/fstab.
keepalive.>
mknod: /dev/vda1: File exists
keepalive.> [ 1.087000] reboot: Power down
keepalive.> builder for ‘/nix/store/jssfngvvww49icqv9j8kvl4zwbwdxgc4-libvirtd-image.drv’ failed with exit code 1
keepalive.> cannot build derivation ‘/nix/store/qg65rxvyy6cn6hzssikdlq0lgwg5rd2w-libvirtd-ssh-image.drv’: 1 dependencies couldn't be built
keepalive.> error: build of ‘/nix/store/qg65rxvyy6cn6hzssikdlq0lgwg5rd2w-libvirtd-ssh-image.drv’ failed
When using a release branch (17.09) this problem does not exist.