I've started working on the FTBFS issue. The compilation issue mentioned in this bug can be fixed by using the patch attached to this email.
However, after this patch is applied, compilation fails for another reason. I've included details of this in #805932. Index: build/src/DeckManager.h =================================================================== --- build.orig/src/DeckManager.h +++ build/src/DeckManager.h @@ -24,7 +24,7 @@ #endif #include <vector> -#include <sigc++/object.h> +#include <sigc++/sigc++.h> #include "Granule-main.h"