Remote scan with Ed25519 key

Chef InSpec
1

Hello,
I'm trying inspec in these day and I'd like it to work with public key auth. My key has been generated with ed25519 algorith and when I try to run a remote scan inspec returns me this error:

unsupported key type `ssh-ed25519' (NotImplementedError)
net-ssh requires the following gems for ed25519 support:

  • rbnacl (>= 3.2, < 5.0)
  • rbnacl-libsodium, if your system doesn't have libsodium installed.
  • bcrypt_pbkdf (>= 1.0, < 2.0)

I only installed inspec RPM and I don't use chef. How can I install that packages?
Thanks,