this derivation will be built:
  /nix/store/mya9bl3r4vcjm85nr7hb37cnv9wkjix4-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/mya9bl3r4vcjm85nr7hb37cnv9wkjix4-bcachefs-module-7.0.0-39-generic.drv'...