Erro do NuGet NU5042

  • Artigo 
`project.json` pack is disabled in the current NuGet version, and will be permanently removed in a future version.
Please consider migrating 'MyProject' to `PackageReference` and using the pack targets.
You can set the 'NUGET_ENABLE_LEGACY_PROJECT_JSON_PACK' environment variable to 'true' to temporarily reenable this functionality.

Problema

Não há suporte para o pacote NuGet.exe para projetos project.json.

Solução

Migre seu projeto para PackageReference e use os destinos do pacote.