utilrb gem cannot be installed on freebsd

[goldhoorn]

It is not possible to install utilrb on freebsd

gem21 install --no-user-install --no-format-executable --no-rdoc --no-ri autobuild

causes:

make "DESTDIR=" install
/usr/bin/install -c -o root -g wheel -m 0755 utilrb.so ./.gem.20150320-1580-18u7jth/utilrb
install: ./.gem.20150320-1580-18u7jth/utilrb/utilrb.so: chown/chgrp: Operation not permitted
*** Error code 71

The GEM_PATH is set correctly:

GEM_HOME=/usr/home/dev/dev/.gems
GEM_PATH=/usr/home/dev/dev/.gems:/home/dev/.gem/ruby/2.1:/usr/local/lib/ruby/gems/2.1

[goldhoorn]

to prevent a missunderstanding the same error occurs when calling:

gem21 install --no-user-install --no-format-executable --no-rdoc --no-ri utilrb

[goldhoorn]

googleing points to this:

wycats/bundler#163

setting

export RB_USER_INSTALL="1"

helps, maybe you can add this to utilrb?