Error compiling Cython file:
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...
cdef load_traceback
cdef Waiter
cdef wait
cdef iwait
cdef reraise
cpdef GEVENT_CONFIG
^
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src/gevent/_gevent_cgreenlet.pxd:181:6: Variables cannot be declared with 'cpdef'. Use 'cdef' instead.
Compiling src/gevent/greenlet.py because it changed.
I'm using ubuntu and getting this error while trying to install bigchaindb.
I'm following the tutorial at Bigchaindb docs and already using the latest version of pip