pkg: ImportError: attempted relative import beyond top-level package

I use command
`gopy pkg -output=out -vm=python3 github.com/go-python/gopy/_examples/hi `
`cd out && make install-pkg`

then
```
>>> from hi impot hi
File "", line 1
from hi impot hi
^
SyntaxError: invalid syntax
>>> from hi import hi
Traceback (most recent call last):
File "", line 1, in
File "/root/out/hi/hi.py", line 20, in
from ..hi import _hi
ImportError: attempted relative import beyond top-level package
```