this derivation will be built:
  /nix/store/4yjkml6b0x3p12ra4gihhp3pnj20vhv7-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/4yjkml6b0x3p12ra4gihhp3pnj20vhv7-bcachefs-module-7.0.0-38-generic.drv'...