py-cryptography-with-libressl-2.7.3

backtrace

λ ykman
Traceback (most recent call last):
  File "/usr/local/bin/ykman", line 11, in <module>
    load_entry_point('yubikey-manager==0.6.1', 'console_scripts', 'ykman')()
  File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 480, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2693, in load_entry_point
    return ep.load()
  File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/local/lib/python3.6/site-packages/ykman/cli/__main__.py", line 32, in <module>
    from ..util import TRANSPORT, Mode, Cve201715361VulnerableError, YUBIKEY
  File "/usr/local/lib/python3.6/site-packages/ykman/util.py", line 40, in <module>
    from OpenSSL import crypto
  File "/usr/local/lib/python3.6/site-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import crypto, SSL
  File "/usr/local/lib/python3.6/site-packages/OpenSSL/crypto.py", line 16, in <module>
    from OpenSSL._util import (
  File "/usr/local/lib/python3.6/site-packages/OpenSSL/_util.py", line 6, in <module>
    from cryptography.hazmat.bindings.openssl.binding import Binding
  File "/usr/local/lib/python3.6/site-packages/cryptography/hazmat/bindings/openssl/binding.py", line 13, in <module>
    from cryptography.hazmat.bindings._openssl import ffi, lib
ImportError: /usr/local/lib/python3.6/site-packages/cryptography/hazmat/bindings/_openssl.abi3.so: Undefined symbol "EVP_PKEY_get1_tls_encodedpoint"