this derivation will be built:
  /nix/store/k3sji8n6mznwj6vfa7b04fj7wqnfkl1n-beads-viewer-0.19.0.drv
error: Cannot build '/nix/store/k3sji8n6mznwj6vfa7b04fj7wqnfkl1n-beads-viewer-0.19.0.drv'.
       Reason: builder failed with exit code 2.
       Output paths:
         /nix/store/9xb30xkfi7l9byzg0kj3ysqxh40a4ii6-beads-viewer-0.19.0
       Last 25 log lines:
       >       --preview-pages string    Preview existing static site bundle
       >       --no-live-reload          Disable live-reload in preview mode
       >       --watch-export            Watch for beads changes and auto-regenerate export (use with
       >                                 --export-pages)
       >       --pages                   Launch interactive Pages deployment wizard
       >       --debug-render string     Render a view and output to file (views: insights, board)
       >       --debug-width int         Width for debug render (default 180)
       >       --debug-height int        Height for debug render (default 50)
       >
       > Agent File Management:
       >       --agents-add       Add beads workflow instructions to AGENTS.md (creates file if needed)
       >       --agents-remove    Remove beads workflow instructions from AGENTS.md
       >       --agents-update    Update beads workflow instructions to latest version
       >       --agents-check     Check AGENTS.md blurb status (default if no --agents-* action)
       >       --agents-dry-run   Show what would happen without executing (use with --agents-*)
       >       --agents-force     Skip confirmation prompts (use with --agents-*)
       >
       > Other Flags:
       >       --network-depth int        Depth of subnetwork when querying specific bead (1-3) (default 2)
       >       --feedback-accept string   Record accept feedback for issue ID (tunes recommendation weights)
       >       --feedback-ignore string   Record ignore feedback for issue ID (tunes recommendation weights)
       >       --feedback-reset           Reset all feedback data to defaults
       >       --feedback-show            Show current feedback status and weight adjustments
       >
       > Run `bv --robot-help` for detailed AI/robot command documentation.
       For full logs, run:
         nix log /nix/store/k3sji8n6mznwj6vfa7b04fj7wqnfkl1n-beads-viewer-0.19.0.drv