Development version cannot be launched directly from GNOME Builder

This is a bit of a "ponies" request and I don't know how hard or easy it would be, but in case this is somehow doable: checking out Meld, opening its directory with GNOME Builder and pressing the "play" (Build / Run) button to build, and then to launch it, you get: bwrap: execvp meld: No such file or directory (apparently flatpak's bubblewrap has trouble finding it)

Maybe someone can figure out how to make it work out of the box, as it would make it easier for newcomers to potentially contribute code to Meld.

Might be something that a Meson build system (#149) might help with...