maintainer-feedback requested: [Bug 251667] devel/ruby-gems fails to install in jail

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Bugzilla Automation <bugzilla at FreeBSD.org> has asked freebsd-ruby (Nobody)
<ruby at FreeBSD.org> for maintainer-feedback:
Bug 251667: devel/ruby-gems fails to install in jail
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251667



--- Description ---
I have template based jails as described in
https://www.freebsd.org/doc/handbook/jails-application.html and /usr/local/ is
a link to /rw/usr-local

In jail's /etc/make.conf I have WRKDIRPREFIX?=/rw/portbuild

All ports installs in my jails just fine except devel/ruby-gems.
While building this port installs target gem file in
/rw/portbuild/usr/ports/devel/ruby-gems/work/stage/rw/usr-local/bin/gem27 while
all other files go to the
/rw/portbuild/usr/ports/devel/ruby-gems/work/stage/usr/local

So when I try to make install I get the following error:
pkg-static: Unable to access file
/rw/portbuild/usr/ports/devel/ruby-gems/work/stage/usr/local/bin/gem27:No such
file or directory
If I copy gem27 to required directory install goes fine.

I think this problem has the same source as
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=249083
devel/ruby-gems somehow uses the real path to /usr/local directory instead of
symlink when build staging