Expects a editor script with in the format of:

```cs
using System.Diagnostics;
using System.IO;
using System.Linq;
using UnityEditor;
using UnityEngine;
public static class UnityLauncherProToolsCustom
{
    [MenuItem("Tools/Build custom")]
    public static void BuildCustom()
    {
        var settings = new BuildPlayerOptions();
        settings.scenes = GetScenes();
        settings.locationPathName = Path.GetFullPath(Path.Combine(Application.dataPath, "..", "..", "..", "Build", PlayerSettings.productName + ".exe"));
        settings.target = EditorUserBuildSettings.activeBuildTarget;
        var report = BuildPipeline.BuildPlayer(settings);
        if (report.summary.result == UnityEditor.Build.Reporting.BuildResult.Succeeded)
            Process.Start(Path.GetDirectoryName(settings.locationPathName));
    }

    static string[] GetScenes()
    {
        return EditorBuildSettings.scenes.Where(scene => scene.enabled).Select(scene => scene.path).ToArray();
    }
}
```