How to build multicorn with python version 3?

Question

Python

I have debian 8 with python 2.7 and python 3.4
installed Python 3 is installed by default via update-alternatives --install /usr/bin/python python /usr/bin/python3.4
Need to build multicorn https://github.com/Kozea/ Multicorn c 3 python.
When I do make, it detects that python 2.7 is installed and says:

src/multicorn.h:1:20: fatal error: Python.h: No such file or directory
 #include "Python.h"

What does the absence of the python-dev package on the system mean.
But the system has python3-dev installed! And it is with him that I want to assemble the package.
Is there something that needs to be changed in the Makefile?
Not strong in the assembly, and google does not work.

Answer 1

python 2.7 or >= python 3.3 as your default python
there are systems where the default is already the third
where it is the second - replacing with the third is risky for performance