JFYK
Install pdfshuffler from salix's repo
$ pdfshuffler
Error: Could not import pdfshuffler
Cause: No module named poppler
$ sudo slapt-get -i pypoppler
$ pdfshuffler
Error: Could not import pdfshuffler
Cause: No module named PyPDF2
$ sudo slapt-get -i pyPdf
$ pdfshuffler starts successfully and works Ok.
It makes sense to add these deps to 'PACKAGE REQUIRED:' in http://download.salixos.org/i486/extra-14.2/PACKAGES.TXT