these 3 derivations will be built:
  /nix/store/d5cmx0m2szifrg0g9xgl41jvvrrj61zc-ZCode-3.16.2-linux-x64.deb.drv
  /nix/store/6vrsx8zz64d9y2qs7gk8zizvsbww49rh-zcode-3.16.2.drv
  /nix/store/0zc78170cvbkfsvaz3r550mpgrlcwjm4-check-zcode.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy