Bugless #3
k0/bgpwtf: backport nixpkgs bump from gerrit/704, fix build, deploy to machines
Description
Over in https://gerrit.hackerspace.pl/c/hscloud/+/704 we tentatively bump nixpkgs for unrelated reasons.
We should split this bump off and fix the resulting Nix build issues, and deploy the NixOS changes to prod machines.