rofi fails to cross build from source, because it fails locating
glib-2.0.pc as a build-time dependency while building libnkutils. The
build-time part tends to translate to a :native dependency, but rofi
currently has none. Since the glib2.0 packaging was reorganized a bit,
the package to depend upon to obtain glib-2.0.pc now is libgio-2.0-dev.
Once adding it, rofi cross builds successfully. I'm attching a patch for
your convenience.

Helmut