dear,what's wrong with this

[jackylee1]

subprocess.CalledProcessError: Command '['cmake', '--build', '.', '--config', 'Release', '--', '-j8']' returned non-zero exit status 2

----------------------------------------

Command "/usr/bin/python -u -c "import setuptools, tokenize;file='/tmp/pip-install-b23up6zk/dlib/setup.py';f=getattr(tokenize, 'open', open)(file);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, file, 'exec'))" install --record /tmp/pip-record-3ci66nem/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-install-b23up6zk/dlib/