By: Michael Lynch <git@mtlynch.io>
Fix check-frontend nix build target to actually run checks Use buildNpmPackage instead of mkBuildStep so npm deps are pre-fetched in a fixed-output derivation rather than at build time (which fails silently due to no network access in the Nix sandbox). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>