https://bugs.gentoo.org/622776

--- mixxx-2.0.0/src/library/trackcollection.h

+++ mixxx-2.0.0/src/library/trackcollection.h

@@ -34,8 +34,7 @@

 #include "library/dao/libraryhashdao.h"

 #ifdef __SQLITE3__

-typedef struct sqlite3_context sqlite3_context;

-typedef struct Mem sqlite3_value;

+#include <sqlite3.h>

 #endif

 class TrackInfoObject;