this derivation will be built:
  /nix/store/z031gl649jzmkz7gjar2jf33xdhh3vj2-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/z031gl649jzmkz7gjar2jf33xdhh3vj2-bcachefs-module-7.0.0-39-generic.drv'...