Failed to pip install

[alexdawn]

I get the following exception for running pip install . when using venv, but not when using conda

Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-install-_lhy0sqg/rtree/setup.py", line 3, in <module>
        import rtree
      File "/tmp/pip-install-_lhy0sqg/rtree/rtree/__init__.py", line 1, in <module>
        from .index import Rtree
      File "/tmp/pip-install-_lhy0sqg/rtree/rtree/index.py", line 6, in <module>
        from . import core
      File "/tmp/pip-install-_lhy0sqg/rtree/rtree/core.py", line 143, in <module>
        rt.Error_GetLastErrorNum.restype = ctypes.c_int
      File "/usr/lib/python3.7/ctypes/__init__.py", line 377, in __getattr__
        func = self.__getitem__(name)
      File "/usr/lib/python3.7/ctypes/__init__.py", line 382, in __getitem__
        func = self._FuncPtr((name_or_ordinal, self))
    AttributeError: /home/alex/projects/state-adjacency-graphs/adj/bin/python3: undefined symbol: Error_GetLastErrorNum