python ethereum pyethapp Failed building wheel for scrypt

Question

My compilation terminated 2 times when installing pyethapp on Ubuntu.

Firstly, I installed packages:

apt-get install build-essential automake pkg-config libtool libffi-dev libgmp-dev

I made virtualenv and tried to install pyethapp inside venv with pip:

pip install mytheapp

but it crashed with 2 following errors:

1.)

#include <openssl/aes.h>
                           ^
  compilation terminated.
  error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

  ----------------------------------------
  Failed building wheel for scrypt

2.)

    scrypt-1.2.0/libcperciva/crypto/crypto_aes.c:6:25: fatal error: openssl/aes.h: No such file or directory
     #include <openssl/aes.h>
                             ^
    compilation terminated.
    error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

    ----------------------------------------
Command "/home/iceing/.virtualenvs/pyethapp/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-3PNrgn/scrypt/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-SSJvgT-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/iceing/.virtualenvs/pyethapp/include/site/python2.7/scrypt" failed with error code 1 in /tmp/pip-build-3PNrgn/scrypt/

Answer 1

This one worked for me:

sudo apt-get install libssl-dev 

Answer 2

It seems you need OpenSSL:

apt-get install openssl

Answer 3

First try installing

sudo apt-get install openssl

However, If it still dont work then try installing

sudo apt-get install libssl-dev