Actually 3.9 was not released yet, it's that version which will support our communication tasks

src/core/simgrid.c

@@ -71,8 +71,8 @@ int main(int argc, char **argv)
 	}
 
 	MSG_init(&argc, argv);
-#if SIMGRID_VERSION_MAJOR < 3 || (SIMGRID_VERSION_MAJOR == 3 && SIMGRID_VERSION_MINOR < 10)
-	/* Versions earlier than 3.10 didn't support our communication tasks */
+#if SIMGRID_VERSION_MAJOR < 3 || (SIMGRID_VERSION_MAJOR == 3 && SIMGRID_VERSION_MINOR < 9)
+	/* Versions earlier than 3.9 didn't support our communication tasks */
 	MSG_config("workstation/model", "ptask_L07");
 #endif