this derivation will be built:
  /nix/store/50d81rddznfhxm76a40mm8jfjx5kik4s-bcachefs-module-7.0.0-31-generic.drv
building '/nix/store/50d81rddznfhxm76a40mm8jfjx5kik4s-bcachefs-module-7.0.0-31-generic.drv'...