this derivation will be built:
  /nix/store/mklj1m8pn94dm1d1bfgcygyx66qfxx7g-bcachefs-module-7.0.0-27-generic.drv
building '/nix/store/mklj1m8pn94dm1d1bfgcygyx66qfxx7g-bcachefs-module-7.0.0-27-generic.drv'...