this derivation will be built:
  /nix/store/v999dlbl7kk04mklfrjppzyx8jzgzrq1-bcachefs-module-7.0.0-29-generic.drv
building '/nix/store/v999dlbl7kk04mklfrjppzyx8jzgzrq1-bcachefs-module-7.0.0-29-generic.drv'...