I saw the description of my program paps in the guix database which sais:

"Paps reads a UTF-8 encoded file and generates a PostScript language
rendering of the file. The rendering is done by creating outline curves
through the Pango ft2 backend."

This is no longer true for the 0.7.1 version. A more accurate description
would be:

"Paps reads a UTF-8 encoded file and generates a pdf file or PostScript
rendering of the file through the pango cairo backend"

Cheers,
Dov