Cannot find Git nor Mercurial

[marc-guenther]

I just installed Meld through Homebrew. I assume that this is the version from this repository, although it said:

meld has been officially discontinued upstream.
It may stop working correctly (or at all) in recent versions of macOS.

Anyway, when I click on "Version Control" and then open one of my mercurial repositories, in the popup is says:

• None
• Git (not found)
• Mercurial (hg not installed)
• and some more VCSs ....

The "None" entry is selected, all of the others are disabled.

Git and Mercurial are both installed:

marc@MarcBook-Pro ~ % which git hg
/opt/homebrew/bin/git
/opt/homebrew/bin/hg

I cannot find anything in Preferences, nor anything in the documentation on how to configure the path to the VCS executables.

Is this the right place to report this? Should I install by downloading the installer here, instead of the deprecated Homebrew cask? (there is no mention of that deprecation on the homepage, though)