emacs-repository-version not defined when cloned with mercurial

[Uwe Brauer]

Hi 

I cloned the emacs repository with mercurial and compiled it as I always
do with

 ./configure --prefix=/opt/emacs27 --with-x-toolkit=athena --with-mailutils


But then emacs-repository-version returned till.

Any change to tell emacs to use the mercurial hash tag?

Regards

Uwe Brauer