[Koha] installing snapshot gives chmod error on Koha log files

[H.S.]

Hello,

I just now tried to install the most recent snapshot of Koha:
Koha-a59c28db3e63f956edffd1e79ab9e9cff3a85dea.tar.gz

and get this error (when I do 'make install', the files are being
written over the earlier installation):
$> make install
/usr/bin/perl "-Iblib/arch" "-Iblib/lib" fix-perl-path.PL blib
chmod: changing permissions of `/home/gsq/koha/var/log/koha-error_log':
Operation not permitted
chmod: changing permissions of
`/home/gsq/koha/var/log/koha-opac-error_log': Operation not permitted


Am I doing something wrong or is this a bug?

thanks,
->HS