Zathura EPUB support issue : "Unknown file type: 'application/zip'"

so the archwiki explains that zathura needs the package zathura-pdf-mupdf for EPUB support.

And this askubuntu thread seems to confirm it works on Ubuntu too.

So I have installed the package thanks to the PPA mentioned in the askubuntu post :

user@host :~/Downloads/test $ > dpkg -s zathura-pdf-mupdf | grep Status
Status: install ok installed

user@host :~/Downloads/test $ > zathura --version
zathura 0.4.3
girara 0.3.2 (runtime: 0.3.2)
(plugin) pdf-mupdf (0.3.4) (/usr/lib/x86_64-linux-gnu/zathura/libpdf-mupdf.so)

And downloaded an example .epub file "Alice in Wonderland" from here.

As you can see below, the file seems to be correctly recognized as an EPUB by my system (as listed here) :

user@host :~/Downloads/test $ > xdg-mime query filetype aliceDynamic.epub 
application/epub+zip

However, zathura looks like it doesn't recognize it as such, and is unable to read the file, even with the zathura-pdf-mupdf package :

user@host :~/Downloads/test $ > zathura aliceDynamic.epub 
error: Unknown file type: 'application/zip'

Do you know what could be the issue ?

System :

• Ubuntu 18.04