bug#49122: (No Subject)

[John Kehayias]

I've managed to fix the initial problem I noted, but this would depend on 
having cairo as an input so that gobject-introspection can find the library to 
patch the typelib. Unfortunately, this would be a circular dependency. This is 
a long standing issue with how cairo is handled here (see, e.g., 
https://gitlab.freedesktop.org/cairo/cairo/-/issues/141).

I don't know how circular dependencies are solved in guix, so I'm not sure what 
to do to fix this. gobject-introspection doesn't need cairo to build or 
function, so the build depends is not really needed other than to fix this bug. 
So this could be done with a separate package or in two steps?