Configuring .NET build step to use x64 MSBuild

Question

The .NET build runner doesn't provide a setting to select MSBuild bitness.

Documentation states:

The .NET runner uses x86 run platform by default. If the x86 version is not available, it will use x64.

Is there a way to make the .NET build step use the x64 MSBuild?

Answer

It is possible to make the .NET runner use x64 MSBuild by adding the configuration parameter teamcity.internal.dotnet.default.bitness=X64 to the build configuration or any parent project.

To change the default behavior on the whole server, this parameter can be added to the <Root project>.

Additional information

.NET runner msbuild native: add a field "Preferable bitness"