Currently there are numerous incompatibilities with .Net core. This will show status of NancyFx package status. This is grouped by functionality. Currently support is for Nancy 2.* which has not released a stable version yet.
Nancy : 2.0.0-clinteastwood
Nancy.Bootstrappers.Ninject - Not Supported
Nancy.ViewEngines.Razor - Not Supported issue #2521
Nancy.Authentication.Stateless : 2.0.0-clinteastwood
Note: Must use at least package ""FluentValidation.AspNetCore : 6.4.0-beta9
Nancy.Validation.FluentValidation : 2.0.0-clinteastwood