The issue is that I can not configure permissions to allow modify world.

I tried to remove PermissionsEx plugin and check if mod`s user without restrictions can break blocks (it works).
So, the question is: What I should allow to [buildCraft] user to make it work?

permissions.yml

groups:
BuildCraft:
default: false
permissions:
- modifyworld.*
schema-version: 1
users:
'[buildCraft]':
group:
- BuildCraft

Use /buildcraft op or you can find the specific UUIDs to whitelist in the Server startup log

Use /buildcraft op or you can find the specific UUIDs to whitelist in the Server startup log

thank you.