Recent cmake needed, but not available on leap 15.4

In order to build and install the latest Qt distribution from source, I need at least cmake 3.21; Leap 15.4 however does not provide this version. The latest is 3.20.
Any suggestion how I can proceed best?

Regards,
Bertwim

You can get cmake here:
https://download.opensuse.org/repositories/devel:/tools:/building/15.4/

Thanks. Somehow I did the wrong google, apparently!
Regards
Bertwim