Nixos Configration
Switching Channel
See which channel is currently used:
$ nix-channel --list | grep nixos
nixos https://nixos.org/channels/nixos-unstable
Change channel with:
$ nix-channel --add https://nixos.org/channels/nixos-17.09 nixos
Timesync issue when upgrading to 19.09: NixOS/nixpkgs#31540
rm -rf {/var/lib/systemd/timesync,/var/lib/private/systemd/timesync}
Helpers
Jump to binary in nix store:
function nix-goto {
cd $(dirname $(realpath $(which $1)))
}
Channel location:
/nix/var/nix/profiles/per-user/root/channels/nixos/pkgs
Google Cloud SDK
Installing Google Cloud SDK should not be done through the nixos package as it is intended to be used for on GCE hosts.
But the python based tooling works fine with pkgs.python, and component installations
works fine.The java based tooling have not been tested yet.
Install as described in https://cloud.google.com/sdk/docs/quickstart-linux (or https://cloud.google.com/sdk/docs/downloads-interactive).
Problems
Git (over ssh) no longer working after upgrade to 19.03.
Add IPQoS=throughput to ssh/config for all hosts.
NixOS/nixpkgs#50389