flake-checker

nix build

./result/bin/flake-checker

# Or point to an explicit path
./result/bin/flake-checker /path/to/flake.lock

Currently performs two checks:

• Checks that any explicit Nixpkgs Git refs are in this list:
  • nixos-22.11
  • nixos-22.11-small
  • nixos-unstable
  • nixos-unstable-small
  • nixpkgs-22.11-darwin
  • nixpkgs-unstable
• Checks that any Nixpkgs dependencies are less than 30 days old

Telemetry

The goal of the Determinate Flake Checker is to help teams stay on recent and supported versions of Nixpkgs. The flake checker collects a little bit of telemetry information to help us make that true.

Here is a table of the telemetry data we collect:

Field	Use
distinct_id	An opaque string which represents your project, by sha256 hashing repository and organization details.
version	The version of the Determinate Flake Checker.
is_ci	Whether the installer is being used in CI (e.g. GitHub Actions).
disallowed	The number of inputs using unsupported branches of Nixpkgs.
outdated	The number of inputs using outdated versions of Nixpkgs.
non_upstream	The number of inputs using forks of Nixpkgs.

To disable diagnostic reporting, set the diagnostics URL to an empty string by passing --no-telemetry or setting FLAKE_CHECKER_NO_TELEMETRY=true.

You can read the full privacy policy for Determinate Systems, the creators of the Determinate Nix Installer, here.