I am posting this after i spent some time trying to figure out why do i the
annoying message "fakeroot preload library libfakeroot.so' not found
aborting" in ptxdist.

This message is not related to fakeroot installed on the hosting machine,
so trying fakeroot
locally with success does not mean much. to figure what the problem is i
used ptxdist bash
command and in it i run fakeroot  and got the same message - preload error.

It appears that fakeroot script has some sort of a bug, the enviroment
variable
FAKEROOT_SYSROOT is not prefixed with a $ sign.
once i added to FAKEROOT_SYSROOT the $ sign and copied the fakeroot
script to to platform-i586/sysroot-host/bin/fakeroot.