these 4 derivations will be built:
  /nix/store/qxcafn200l259v83jdskpd279yngfi7q-closure-info.drv
  /nix/store/ybskq5dyz8p6aa2mhymfxx9pccxfyr91-clan-cli-source.drv
  /nix/store/vz7ww5dqm9s5z0m2qdf0ig6kbcj7v84m-clan-cli.drv
  /nix/store/5qr01jzlj6yjqd3jxaa2wddwwask0d3r-check-vars.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
error: path '/nix/store/p26gm800zhi765shwn1zkc4c9j3yabfp-check-vars' is not valid
error: Cannot build '/nix/store/5qr01jzlj6yjqd3jxaa2wddwwask0d3r-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/p26gm800zhi765shwn1zkc4c9j3yabfp-check-vars