diff --git a/gen/org/open_power/Common/Callout/meson.build b/gen/org/open_power/Common/Callout/meson.build
index d208fec..3b9e4b4 100644
--- a/gen/org/open_power/Common/Callout/meson.build
+++ b/gen/org/open_power/Common/Callout/meson.build
@@ -1,13 +1,13 @@
 # Generated file; do not modify.
 generated_sources += custom_target(
     'org/open_power/Common/Callout__cpp'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Common/Callout.errors.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Common/Callout.errors.yaml',  ],
     output: [ 'error.cpp', 'error.hpp',  ],
     command: [
         sdbuspp_gen_meson_prog, '--command', 'cpp',
         '--output', meson.current_build_dir(),
         '--tool', sdbusplusplus_prog,
-        '--directory', meson.source_root(),
+        '--directory', meson.project_source_root(),
         'org/open_power/Common/Callout',
     ],
 )
diff --git a/gen/org/open_power/Common/meson.build b/gen/org/open_power/Common/meson.build
index 0963f9b..60c3605 100644
--- a/gen/org/open_power/Common/meson.build
+++ b/gen/org/open_power/Common/meson.build
@@ -2,13 +2,13 @@
 subdir('Callout')
 generated_others += custom_target(
     'org/open_power/Common/Callout__markdown'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Common/Callout.errors.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Common/Callout.errors.yaml',  ],
     output: [ 'Callout.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/Common/Callout',
     ],
     build_by_default: true,