this derivation will be built:
  /nix/store/p15fwflnhqghwbjxzsnwya5cg3p0d06v-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/p15fwflnhqghwbjxzsnwya5cg3p0d06v-bcachefs-module-7.0.0-38-generic.drv'...