6.0.200-hack
After extract, edit sdk-manifests/6.0.200/microsoft.net.workload.mono.toolchain/WorkloadManifest.json and change:
"Microsoft.NET.Workload.Emscripten": "6.0.1"
to
"Microsoft.NET.Workload.Emscripten": "6.0.0"
There was a little hack to make it compile, because of missing Microsoft.NET.Workload.Emscripten.Manifest-6.0.200 at the time of build.