this derivation will be built:
  /nix/store/7c4ar8hws002fmhn4z1bdfwz4wrg0221-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/7c4ar8hws002fmhn4z1bdfwz4wrg0221-bcachefs-module-7.0.0-39-generic.drv'...