Error enabling TokuDB through ps_tokudb_admin

Ubuntu 15.10
Docker 1.9.1

But if we run check of this process (mysqld in container) through host (not in container), its return ok:

Previous version:

# Check if server is running with jemalloc - if not warn that restart is needed
if [ $ENABLE = 1 ]; then
printf "Checking if Percona Server is running with jemalloc enabled...\n"
JEMALLOC_STATUS=$(grep -c jemalloc /proc/${PID_NUM}/environ)
if [ $JEMALLOC_STATUS = 0 ]; then
printf "ERROR: Percona Server is not running with jemalloc, please restart mysql service to enable it and then run this script...\n\n";
exit 1
else
printf "INFO: Percona Server is running with jemalloc enabled.\n\n";
fi
fi

Current version of ps_tokudb_admin (with this error?):

# Check if server is running with jemalloc - if not warn that restart is needed
if [ $ENABLE = 1 ]; then
printf "Checking if Percona Server is running with jemalloc enabled...\n"
grep -qc jemalloc /proc/${PID_NUM}/environ || ldd $(which mysqld) | grep -qc jemalloc
JEMALLOC_STATUS=$?
if [ $JEMALLOC_STATUS = 1 ]; then
printf "ERROR: Percona Server is not running with jemalloc, please restart mysql service to enable it and then run this script...\n\n";
exit 1
else
printf "INFO: Percona Server is running with jemalloc enabled.\n\n";
fi
fi