--- libayatana-appindicator-glib-2.0.3.orig/bindings/vala/CMakeLists.txt
+++ libayatana-appindicator-glib-2.0.3/bindings/vala/CMakeLists.txt
@@ -6,7 +6,12 @@
 
 find_package(PkgConfig REQUIRED)
 pkg_check_modules(Vala REQUIRED vapigen)
-find_program(VAPI_GEN NAMES vapigen)
+pkg_get_variable(_pc_vapigen_executable vapigen vapigen)
+if(_pc_vapigen_executable)
+    set(VAPI_GEN "${_pc_vapigen_executable}")
+else()
+    find_program(VAPI_GEN NAMES vapigen)
+endif()
 
 add_custom_command (
     OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/ayatana-appindicator-glib.vapi"