this derivation will be built:
  /nix/store/fcn729g2l7l8haljs31bv1dsgha4wlg4-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/fcn729g2l7l8haljs31bv1dsgha4wlg4-bcachefs-module-7.0.0-39-generic.drv'...