Build deb package with more recent cmake on launchpad

I created a library that I'd like to share via deb packages in a ppa.

I'd like to support from ubuntu 20.04 but I need a more recent version of cmake to build the library, and I'm wondering what would be the best way to do it.

Is it possible to use a cmake from another ppa in build-depends?

If not, should I locally build a more recent cmake in the rules file and use it?

Or should I make a recent cmake package in my ppa and use it for building the package of my library?

thanks in advance.