Cant get ICustomBootstrap to work in build

So after a few hours of trying to get my project to build properly, I found that the reason it is not working is my ICustomBootstrap.Initialize is not called.

Not sure if I am missing something, I tried adding a DotsRuntimeBuildProfile step to my build pipeline, because the name sounds promising, but I can't find any documentation on it.
I can't add it though, because if I try, it will throw an error:

Code (CSharp):

1. NullReferenceException: Object reference not set to an instance of an object
2. Unity.Build.DotsRuntime.DotsRuntimeBuildProfile.ConstructPipeline () (at Library/PackageCache/com.unity.platforms@0.8.0-preview.7/Editor/Unity.Build.DotsRuntime/Components/DotsRuntimeBuildProfile.cs:29)
3. Unity.Build.DotsRuntime.DotsRuntimeBuildProfile.set_Target (Unity.Build.DotsRuntime.BuildTarget value) (at Library/PackageCache/com.unity.platforms@0.8.0-preview.7/Editor/Unity.Build.DotsRuntime/Components/DotsRuntimeBuildProfile.cs:44)

Maybe someone can share a build configuration/package versions that work for building a project that uses an ICustomBootstrap?

I am using Entities 0.14.0-preview.19 and Platforms (+Desktop +Windows) 0.8.0-preview-7.
My Build Configuration looks like this:

 

A month later and I still couldn't get this running. The exception when adding a DotsRuntimeBuildProfile is reproducable even in an empty project, so I wrote a bug report about it (Case 1281745), but got no response aside from the automatic one. It also doesn't show up in the Issue Tracker.

But since I couldn't find anyone else having problems with this I guess the missing DotsRuntimeBuildProfile is not the reason why the ICustomBootstrap is not called. So what are the requirements for ICustomBootstrap getting called in builds?

 

With Entities 0.14, I've been using the 0.7 versions of Platforms and ICustomBootstrap has been working perfectly. I do not use the DotsRuntimeBuildProfile.

 

Thanks, that was helpful. I tried that configuration and it didn't work either, so it had to be something else.
Turns out the reason was my bootstrap was placed in a package. After moving it into the assets folder it started to work.

 

I have the same issue. The ICustomBootstrap is not getting called, but only when I use the custom build config. It executes normally when I build via the standard unity build menu. Struggling to figure this one out.

 

in your defines add UNITY_DISABLE_AUTOMATIC_SYSTEM_BOOTSTRAP