NixOS dev environment

Note: this is not used in production.

Getting and using a shell

To get a shell with this env:

$ nix-shell

or

$ nix develop

To run a command in this env, you can’t use nix-shell --run, but instead:

$ NIX_SHELL_RUN='...' nix-shell

To set up clangd with remote indexing support:

1. $ NIX_SHELL_RUN='readlink /usr/bin/clangd' nix-shell
2. Copy the path into your editor config

Updating dependencies

Periodically, we'll want to update dependencies to keep them relatively fresh. To do that:

$ nix run github:NixOS/nixpkgs\#npins -- update

Then commit the new sources.json.

Rolling back dependencies

If something breaks due to a bad deps update, rolling back is as simple as reverting to an earlier version of sources.json.