this derivation will be built:
  /nix/store/jcviqy3s79k3zsala7wffn3b2fah4cq1-nix-shell.drv
building '/nix/store/jcviqy3s79k3zsala7wffn3b2fah4cq1-nix-shell.drv' on 'grpc://[fddb:4344:343b:14b9:399:9324:19d9:3451]:50051?ca-cert=/run/nix-grpc-store/ca.crt&connect-timeout=5'
building '/nix/store/jcviqy3s79k3zsala7wffn3b2fah4cq1-nix-shell.drv' on [fddb:4344:343b:14b9:399:9324:19d9:3451]:50051
nix-shell> stibnite: building jcviqy3s79k3zsala7wffn3b2fah4cq1-nix-shell.drv
nix-shell> Running phase: buildPhase
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy

upload niks3: ok