@wpoely86: Be very careful with renaming functions, since you're changing the API that way... In this case, you've missed the `get_core_count` call in `easybuild/main.py`, so please change it there too.

It's good practice to deprecate the old function, so please include this in `systemtools.py`:

```python
def get_core_count():
    """
    Try to detect the number of virtual or physical CPUs on this system
    (DEPRECATED, use get_avail_core_count instead)
    """
    _log.deprecated("get_core_count() is deprecated, use get_avail_core_count() instead", '2.0')
    return get_avail_core_count()
```