diff --git a/example/meson.build b/example/meson.build
index 837c6f7..b338dc1 100644
--- a/example/meson.build
+++ b/example/meson.build
@@ -44,20 +44,10 @@
     dependencies: asio_dep,
 )
 
-calc_buildroot = meson.current_build_dir()
-calc_files = files(
-    run_command(
-        sdbusgen_prog,
-        '--tool', sdbusplusplus_prog,
-        '--output', calc_buildroot,
-        'net',
-        check: true
-    ).stdout().strip().split('\n')
-)
-
+subdir('net/poettering/Calculator')
 executable(
     'calculator-server',
     'calculator-server.cpp',
-    calc_files,
+    calculator_sources,
     dependencies: sdbusplus_dep,
 )