Could not install pyzmq using apt,pip,pip3,easy_install etc any command

Question

I tried everything but pyzmq package is not installing.

It stops while trying wheel. I even reinstalled wheel but no result.

I have already installed all basic prereq stuff. I even installed clang and go-lang but nothing works it even shows same error while installing Jupiter notebook too.

Answer 1

You need to install the dev version of the libcrypt package in Termux:

apt install libcrypt-dev

This version of the package includes the required crypt.h header file.

Trying it out

I dug out an old alarm clock/Android tablet I had lying around in order to test this out. I followed the instructions I found in this blog post to install Jupyter. After a bunch of system updates, a bricking:

and an unbricking, I ended up getting the same error that you did, and I solved it by installing the libcrypt-dev package. All of the Python packages were very slow to build in Termux on the tablet, but I did get Jupyter notebook to work:

So it does indeed appear that installing libcrypt-dev fixes the problem.