this derivation will be built:
  /nix/store/81nn8l8ybj0vbc16m65xhi70qqrhwhlv-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/81nn8l8ybj0vbc16m65xhi70qqrhwhlv-bcachefs-module-7.0.0-38-generic.drv'...