https://github.com/crosswire/xiphos/pull/1103.patch
dbus is not called for the main target, but it should.
diff --git a/src/main/CMakeLists.txt b/src/main/CMakeLists.txt
index 4952757..a65a92b 100644
--- a/src/main/CMakeLists.txt
+++ b/src/main/CMakeLists.txt
@@ -77,6 +77,17 @@ target_link_libraries(main
   PkgConfig::Biblesync
   )
 
+IF (DBUS)
+  target_include_directories (main
+    PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
+    PkgConfig::DBus
+    )
+  target_link_libraries(main
+    PRIVATE
+    PkgConfig::DBus
+    )
+ENDIF (DBUS)
+
 if(WK_FOUND)
   target_compile_definitions(main
     PRIVATE