diff --git a/gen/org/open_power/meson.build b/gen/org/open_power/meson.build
index 992de62..1d10677 100644
--- a/gen/org/open_power/meson.build
+++ b/gen/org/open_power/meson.build
@@ -4,13 +4,13 @@
 subdir('Host')
 generated_others += custom_target(
     'org/open_power/Host__markdown'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Host.errors.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Host.errors.yaml',  ],
     output: [ 'Host.md' ],
     command: [
         sdbuspp_gen_meson_prog, '--command', 'markdown',
         '--output', meson.current_build_dir(),
         '--tool', sdbusplusplus_prog,
-        '--directory', meson.source_root(),
+        '--directory', meson.project_source_root(),
         'org/open_power/Host',
     ],
     build_by_default: true,