this derivation will be built:
  /nix/store/ngyj8v2jghphn95mww78rb6a0g9vpcmm-inputDerivation-gh-pages.drv
building '/nix/store/ngyj8v2jghphn95mww78rb6a0g9vpcmm-inputDerivation-gh-pages.drv'...
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy