these 3 derivations will be built:
  /nix/store/bq00dj19fj22dwqxim9fy5mqapazi7pj-clan-cli-source.drv
  /nix/store/l72acdp35a4gd5rkwyn19wggaz2ghcz4-clan-cli.drv
  /nix/store/is8rfvc553lp9n6cxpwdph8gp804zcxw-nix-shell.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy