this derivation will be built:
  /nix/store/drx51hb4nb8xrd3zlbl5nzc0r8i85jc8-spec-just.drv
this path will be fetched (0.4 KiB download, 0.7 KiB unpacked):
  /nix/store/f331d1g7mpdxckwswvg8qr7fxmnsv06i-writable-tmpdir-as-home-hook