The <import> XSLT element needs to be replaced by <include>
WiP here: https://gitlab.gnome.org/amiloradovsky/gtk-doc/tree/no-import
There should be explicit dependency on DocBook XSL (say, 1.79), but I'm not sure how to tell Meson to make the paths from the dependency referenced by the .
Edited by Andrew Miloradovsky