--- src/Backends/IF97/IF97Backend.orig.h	2022-12-22 15:23:06.000000000 +0100
+++ src/Backends/IF97/IF97Backend.h	2022-12-22 15:23:22.000000000 +0100
@@ -3,7 +3,7 @@
 #define IF97BACKEND_H_
 
 #include "DataStructures.h"
-#include "externals/IF97/IF97.h"
+#include <IF97.h>
 #include "AbstractState.h"
 #include "Exceptions.h"
 #include <vector>