Using custom providers in Terraform

The RKE provider that I'd like to use is some versions behind. It seemed easy enough to update the dependency, but I struggled to get this custom RKE provider working without having to upload it somewhere. The documentation didn't seem to be obvious enough. After searching on Google, I found this issue on GitHub, which made it clear.

For me, the example meant:

# main.tf

terraform {
  required_providers {
    rke = {
      source = "my.local/marco/rke"
      version = "1.3.1"
    }
  }
}

~/.terraform.d/plugins/my.local/marco/rke/1.3.1/linux_amd64/terraform-provider-rke_v1.3.1