Issue with texlive-collection-context

[Vanda Vodkamilkevich]

When using setup.exe, I have the following error message :
Package: _/Unknown package
texlive-collection-context.sh exit code 127

I tried to run the script manually and got:
$ sh -x  texlive-collection-context.sh
+ /usr/bin/mtxrun --generate
texlive-collection-context.sh: ligne 1: /usr/bin/mtxrun: No such file or
directory

Dunno where is mtxrun supposed to come from, any hints?