this derivation will be built:
  /nix/store/k4jnn5f42frhp68ng31y56pqpa4npx5f-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/k4jnn5f42frhp68ng31y56pqpa4npx5f-bcachefs-module-7.0.0-39-generic.drv'...