using System;

namespace Cake.Xamarin.Build
{
    [Flags]
    public enum BuildPlatforms
    {
        Mac = 0,
        Windows = 1,
        Linux = 2
    }
}

using System;

namespace Cake.Xamarin.Build
{
    [Flags]
    public enum BuildPlatforms
    {
        Mac = 1,
        Windows = 2,
        Linux = 4
    }
}

Fix flags (Mac shouldn't be 0 based)
Fix flags (Mac shouldn't be 0 based)