StackOverflow has a ton of solutions with PowerShell and other external tools, but _I_ could no install something additional on that system. Nor had PS.
Works around the issue that the time is evaluated at start for each item, as well:
λ cmd /v:on /c "echo !time! & YOURCOMMAND & echo !time!"
Hint: also run cmake with just one core
λ cmd /v:on /c "echo !time! & cmake --build build\CMake\Debug\build -j1 --target all & echo !time!"