ImportError: pycurl: libcurl link-time ssl backend (nss) is different from compile-time ssl backend

(python3env) [sujit.kumar@terraform python3env]$ python
Python 3.6.8 (default, Aug  7 2019, 17:28:10)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-39)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import pycurl
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: pycurl: libcurl link-time ssl backend (nss) is different from compile-time ssl backend (openssl)
>>>
>>> exit
Use exit() or Ctrl-D (i.e. EOF) to exit
>>> exit()

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My pycurl was built with nss and pip3 install was compiling this with openssl 

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# Workaround

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pip3 uninstall pycurl 

export PYCURL_SSL_LIBRARY=nss

pip3 install pycurl 

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# import of pycurl was fine

# python -c "import pycurl"