> Or, for a complete fix, patch glib-2.60.6/gio/gdesktopappinfo.c 
> 
>   tmp = "gio-launch-desktop"
> 
> to say
> 
>   tmp = "/gnu/store/xyz-glib-.../bin/gio-launch-desktop";
> 
> instead.  The latter has the advantage that it magically fixes ALL the applications.

When I try that, I get a circular dependency between the "bin" and the "out" outputs.

To be continued...