[Dovecot] Sieve 0.2.2 how to use sievec

Hello list,

How can I compile sieve script under new 0.2.2 version from comandline?

Under root: #sievec default-before.sieve sievec(root): Error: user root: Initialization failed: Namespace '': mkdir(/root/data) failed: Permission denied (euid=8(mail) egid=12(mail) missing +w perm: /root, euid is not dir owner) sievec(root): Fatal: Invalid user settings. Refer to server log for more information.