But like Paul said, you can just use the output from

resourceGroup

as the input to

virtualNetwork

to create the dependency.

virtualNetwork, err := network.NewVirtualNetwork(ctx, vnetName, &network.VirtualNetworkArgs{
    Name:              vnetName,
    Location:          location,
    ResourceGroupName: resourceGroup.Name(),
    AddressSpaces:     VnetAddressSpaces,
})