1. Download GhostPDL source code - http://www.ghostscript.com/download/gpdldnld.html eg.

   axel "http://downloads.ghostscript.com/public/ghostpdl-9.09.tar.gz"

2. Extract it

   atool -x ghostpdl-9.09.tar.gz

3. Install dependencies

   sudo apt-get install libxext-dev libxt-dev libjpeg-dev

4. Enter directory

   cd ghostpdl*

5. Prepare compilation

   ./configure

6. Compile

   make xps

7. Install

   sudo make install

8. Finish installation

   sudo cp xps/obj/gxps /usr/bin/

9. Convert

   for i in *.xps; do gxps -sDEVICE=pdfwrite -o "${i%.*}.pdf" "$i";done;

~~DISCUSSION~~