The core is now loaded from an image which is specific to the
derivation version and should not cause errors like `ore was built for runtime "-nixbld-2021-07-18-00-37-37" but this is "-nixbld-2021-07-24-18-10-15"`.
Update pkgs/development/tools/roswell/default.nix
Co-authored-by: Sandro <sandro.jaeckel@gmail.com>
