See also https://gitlab.com/pdftools/pdfposter/issues/2 and https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=833219
See also https:/ /gitlab. com/pdftools/ pdfposter/ issues/ 2 and https:/ /bugs.debian. org/cgi- bin/bugreport. cgi?bug= 833219