There is a subtle difference when executable bit is a part of the umask.
And at least some versions (Debian/stretch) fail if the resulting mode
would've been different if not for the umask setting.
Fixes#998.
Although, with such chmods/umasks it is likely that some package installation
will break anyway. But I'll leave it until somebody complains.
Signed-off-by: Alexey Neyman <stilor@att.net>
Also, build containers with --no-cache: distributions like ArchLinux
retire their packages very quickly, need to always use up-to-date
package databases.
Signed-off-by: Alexey Neyman <stilor@att.net>
