Qt multi-process build from source fails with error: The process cannot access the file because it is being used by another process

I build qt from source on Windows. Batch file is attached: build-qt.bat

After some time of building phase I get the error: `The process cannot access the file because it is being used by another process.` The error happens at different points of the build, i.e. it looks like it is not tied to a particular file.

I tried:

• to have only `-release` instead of `-debug-and-release`
• instead of `jom`, to have
  ```
  set CL=/MP
  nmake
  ```

• to have `-mp` option and call `nmake`

• I also tried to download different versions of Qt. e.g. Qt 5.15.2

• I tried to revert my `Windows 10 Pro 21H2 19044.1826` VM to an earlier snapshot.

None of those helped. The only thing that helped is to hum only one building process: i.e., just to have `nmake` and that's it (i.e., without `CL=/MP` or `-mp` option). But I don't like this, as it allows to use only one core for the build.

I have found this bug: https://bugreports.qt.io/browse/QTBUG-66059?attachmentViewMode=list  but it does not help. It is closed, but I still get the error. How can I fix this error? I am not the only person who builds Qt from source, I guess, but I cannot find any solution on the Internet. I would really appreciate any help!