where am i going wrong with the resource dependencies please

resourceGroup, err := core.NewResourceGroup(ctx, resourcegroupName, &core.ResourceGroupArgs{
	Location: location,
})
if err != nil {
	return err
}

// Create vnet
virtualNetwork, err := network.NewVirtualNetwork(ctx, vnetName, &network.VirtualNetworkArgs{
	Name:              vnetName,
	Location:          location,
	ResourceGroupName: resourcegroupName,
	AddressSpaces:     VnetAddressSpaces,
}, pulumi.ResourceOpt{DependsOn: []Resource{resourceGroup.id}})
if err != nil {
	return err
}