this derivation will be built:
  /nix/store/rkrif4bgs37rf41gy1za3jj1ig4sxvgp-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/rkrif4bgs37rf41gy1za3jj1ig4sxvgp-bcachefs-module-7.0.0-38-generic.drv'...