this derivation will be built:
  /nix/store/p7lnm4z41whsa7ig887fnx5qnfqr726m-bcachefs-module-7.0.0-31-generic.drv
building '/nix/store/p7lnm4z41whsa7ig887fnx5qnfqr726m-bcachefs-module-7.0.0-31-generic.drv'...