TLpretest -- l3build issue

[Daniel Flipo]

Hi all,

I am trying to run my bunch of regression tests for babel-french with
the new (pre) TL2020 but I have an issue with lualatex (only):

Running
% lualatex myfile.lvt
works fine, but

% l3build check myfile.lvt

keeps rebuilding the lualatex format on TEXMFHOME and stops before
checking!  This occurs with any ".lvt" file.

The lualatex format is found by kpsewhich:

% kpsewhich -engine=/ lualatex.fmt
/usr/local/texlive/2020/texmf-var/web2c/luahbtex/lualatex.fmt

I thought a symbolic link might help:
% (cd /usr/local/texlive/2020/texmf-var/web2c/luatex/; ln -s
../luahbtex/lualatex.fmt)
but it doesn't.

Thanks for any hints!
-- 
Daniel Flipo