warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
this derivation will be built:
  /nix/store/shdpllmizy0ms0siw13ygy2p6ss0d7lq-inputDerivation-gh-pages.drv
building '/nix/store/shdpllmizy0ms0siw13ygy2p6ss0d7lq-inputDerivation-gh-pages.drv'...