this derivation will be built:
  /nix/store/iwfw5b4r3w41v662s1iy5m09vw807xrg-bcachefs-module-7.0.0-29-generic.drv
building '/nix/store/iwfw5b4r3w41v662s1iy5m09vw807xrg-bcachefs-module-7.0.0-29-generic.drv'...