this derivation will be built:
  /nix/store/2fxpzcwhnh108b1csz314s22xxc7v2s2-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/2fxpzcwhnh108b1csz314s22xxc7v2s2-bcachefs-module-7.0.0-39-generic.drv'...