Kernel.` doesn't work in drb?

Hi,

A script has the line

puts %x(echo hi)

When run normally, hi is echoed. But when the line is executed as part
of a drb server, an empty line is printed.

I’m using Ubuntu 8.04, and ruby 1.8.7 (2008-09-27 revision 0) (drb is
2.0.4)

Thank you,
Ittay