```
[manjaro RsaCtfTool-master]# pip install PyCrypto
Collecting PyCrypto
  Using cached https://files.pythonhosted.org/packages/60/db/645aa9af249f059cc3a368b118de33889219e0362141e75d4eaf6f80f163/pycrypto-2.6.1.tar.gz
Building wheels for collected packages: PyCrypto
  Building wheel for PyCrypto (setup.py) ... error
  ERROR: Command errored out with exit status 1:
   command: /usr/bin/python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-kwq12ozd/PyCrypto/setup.py'"'"'; __file__='"'"'/tmp/pip-install-kwq12ozd/PyCrypto/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /tmp/pip-wheel-hyr5dgny --python-tag cp37
       cwd: /tmp/pip-install-kwq12ozd/PyCrypto/
  Complete output (187 lines):
  running bdist_wheel
  running build
  running build_py
  creating build
  creating build/lib.linux-x86_64-3.7
  creating build/lib.linux-x86_64-3.7/Crypto
  copying lib/Crypto/pct_warnings.py -> build/lib.linux-x86_64-3.7/Crypto
  copying lib/Crypto/__init__.py -> build/lib.linux-x86_64-3.7/Crypto
  creating build/lib.linux-x86_64-3.7/Crypto/Hash
  copying lib/Crypto/Hash/MD5.py -> build/lib.linux-x86_64-3.7/Crypto/Hash