these 2 derivations will be built:
  /nix/store/drxisqhm24cdlizqm62dx3i4921gnb9y-home-manager.drv
  /nix/store/iij88jwmq1pz61hsg38bc4a39rj78bsq-nix-shell.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy