VC-Build problem on NET 5

Our vc-build tool is currently working on Net Core 3.1 and could have problems running on Net 5.
To use vc-build before the release of a version for Net 5, you could create global.json file to the folder with your projects (or upper by hierarchy).
Here is the possible global.json content t use the latest 3.x.x sdk:

  "sdk": {
    "version": "3.0.0",
	"rollForward": "latestMinor"