Problem installing HTSeq on MacOS

[Hiroki]

Hi

I am trying to install HTSeq on MacOS El Capitan (10.11.6) like this:
pip install htseq --user

Then I got the following error message:
htslib/cram/cram_io.c:60:10: fatal error: 'lzma.h' file not found
#include <lzma.h>
^
1 error generated.
error: command 'clang' failed with exit status 1

----------------------------------------
Failed building wheel for pysam

When I type:
sudo find /usr -name lzma.h -print

I got these:
/usr/local/Cellar/xz/5.0.6/include/lzma/lzma.h
/usr/local/Cellar/xz/5.0.6/include/lzma.h
/usr/local/Cellar/xz/5.2.3/include/lzma.h
/usr/local/include/lzma.h

Does anybody here know the solution please??
Thanx.

Hiroki