these 3 derivations will be built:
  /nix/store/hsj0k2vf3n7fhs2naggn6ca559pbxwbp-beads-1.3.1.drv
  /nix/store/79gf1c0sm80arjrfm7dnqch563fnlqid-gastown-1.2.1.drv
  /nix/store/lxmz8lawaay107zmdn8q0qa364kp1y8z-check-gastown.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy