what is the MacPorts equivalent of homebrew pinning; freezing an installed version?

[Kenneth Wolcott]

Hi;

what is the MacPorts equivalent of homebrew pinning; freezing an
installed version?

I have homebrew Lilypond 2.22.2 installed and pinned.

I have MacPorts Lilypond 2.22.2 installed.

I'd like to prevent the update MacPorts Lilypond version while I
finish converting all of my existing Lilypond 2.22.x engravings to
2.24.x.

If I can get the MacPorts Lilypond version to "freeze", then I will
uninstall the Homebrew version of Lilypond.  I'm slowly trying to
replace everything that I have installed with homebrew with the
MacPorts port.

Thanks,
Ken Wolcott