Avery's ULTRAKILL Utilities
If you're using a custom ULTRAKILL path, for example to preserve hard drive space on your OS partition, or for other reasons, ULTRAPORTAL will not compile out of the box.
You need to create a file in the project root directory called ULTRAKILLPATH.user, where you can specify your custom game path like this:
<Project>
<PropertyGroup>
<ULTRAKILLPath>INSERT THE PATH TO THE DIRECTORY CONTAINING ULTRAKILL.exe/</ULTRAKILLPath>
</PropertyGroup>
</Project>
Keep in mind that the path needs to be to the directory that contains your ULTRAKILL executable file. For example D:/Steam/steamapps/common/ULTRAKILL.