this derivation will be built:
  /nix/store/brygs9g21lhpk7p0fanq6zd6w45vann4-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/brygs9g21lhpk7p0fanq6zd6w45vann4-bcachefs-module-7.0.0-38-generic.drv'...