this derivation will be built:
  /nix/store/9dasm4qbhing4kvq56fcb39h6mwhb46k-bcachefs-module-7.0.0-31-generic.drv
building '/nix/store/9dasm4qbhing4kvq56fcb39h6mwhb46k-bcachefs-module-7.0.0-31-generic.drv'...