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,
diff --git a/gen/org/open_power/Control/Host/meson.build b/gen/org/open_power/Control/Host/meson.build
index d1f76c8..2ee93bb 100644
--- a/gen/org/open_power/Control/Host/meson.build
+++ b/gen/org/open_power/Control/Host/meson.build
@@ -1,13 +1,13 @@
 # Generated file; do not modify.
 generated_sources += custom_target(
     'org/open_power/Control/Host__cpp'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Control/Host.interface.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Control/Host.interface.yaml',  ],
     output: [ 'server.cpp', 'server.hpp', 'client.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/Control/Host',
     ],
 )
diff --git a/gen/org/open_power/Control/TPM/SecurityKeys/meson.build b/gen/org/open_power/Control/TPM/SecurityKeys/meson.build
index a7ba244..3fce1c3 100644
--- a/gen/org/open_power/Control/TPM/SecurityKeys/meson.build
+++ b/gen/org/open_power/Control/TPM/SecurityKeys/meson.build
@@ -1,13 +1,13 @@
 # Generated file; do not modify.
 generated_sources += custom_target(
     'org/open_power/Control/TPM/SecurityKeys__cpp'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Control/TPM/SecurityKeys.interface.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Control/TPM/SecurityKeys.interface.yaml',  ],
     output: [ 'server.cpp', 'server.hpp', 'client.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/Control/TPM/SecurityKeys',
     ],
 )
diff --git a/gen/org/open_power/Control/TPM/meson.build b/gen/org/open_power/Control/TPM/meson.build
index 5150101..d0508fa 100644
--- a/gen/org/open_power/Control/TPM/meson.build
+++ b/gen/org/open_power/Control/TPM/meson.build
@@ -2,13 +2,13 @@
 subdir('SecurityKeys')
 generated_others += custom_target(
     'org/open_power/Control/TPM/SecurityKeys__markdown'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Control/TPM/SecurityKeys.interface.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Control/TPM/SecurityKeys.interface.yaml',  ],
     output: [ 'SecurityKeys.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/Control/TPM/SecurityKeys',
     ],
     build_by_default: true,
diff --git a/gen/org/open_power/Control/meson.build b/gen/org/open_power/Control/meson.build
index decab67..4a3a327 100644
--- a/gen/org/open_power/Control/meson.build
+++ b/gen/org/open_power/Control/meson.build
@@ -2,13 +2,13 @@
 subdir('Host')
 generated_others += custom_target(
     'org/open_power/Control/Host__markdown'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Control/Host.interface.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Control/Host.interface.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/Control/Host',
     ],
     build_by_default: true,
diff --git a/gen/org/open_power/Host/Access/meson.build b/gen/org/open_power/Host/Access/meson.build
index c93f760..0f56f1c 100644
--- a/gen/org/open_power/Host/Access/meson.build
+++ b/gen/org/open_power/Host/Access/meson.build
@@ -1,13 +1,13 @@
 # Generated file; do not modify.
 generated_sources += custom_target(
     'org/open_power/Host/Access__cpp'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Host/Access.errors.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Host/Access.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/Host/Access',
     ],
 )
diff --git a/gen/org/open_power/Host/meson.build b/gen/org/open_power/Host/meson.build
index 903502b..f59ee92 100644
--- a/gen/org/open_power/Host/meson.build
+++ b/gen/org/open_power/Host/meson.build
@@ -1,13 +1,13 @@
 # Generated file; do not modify.
 generated_sources += custom_target(
     'org/open_power/Host__cpp'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Host.errors.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Host.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/Host',
     ],
 )
@@ -15,13 +15,13 @@
 subdir('Access')
 generated_others += custom_target(
     'org/open_power/Host/Access__markdown'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Host/Access.errors.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Host/Access.errors.yaml',  ],
     output: [ 'Access.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/Access',
     ],
     build_by_default: true,
diff --git a/gen/org/open_power/Inventory/Decorator/Asset/meson.build b/gen/org/open_power/Inventory/Decorator/Asset/meson.build
index 36867b1..dd31f0d 100644
--- a/gen/org/open_power/Inventory/Decorator/Asset/meson.build
+++ b/gen/org/open_power/Inventory/Decorator/Asset/meson.build
@@ -1,13 +1,13 @@
 # Generated file; do not modify.
 generated_sources += custom_target(
     'org/open_power/Inventory/Decorator/Asset__cpp'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Inventory/Decorator/Asset.interface.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Inventory/Decorator/Asset.interface.yaml',  ],
     output: [ 'server.cpp', 'server.hpp', 'client.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/Inventory/Decorator/Asset',
     ],
 )
diff --git a/gen/org/open_power/Inventory/Decorator/meson.build b/gen/org/open_power/Inventory/Decorator/meson.build
index a49b346..f1c9d52 100644
--- a/gen/org/open_power/Inventory/Decorator/meson.build
+++ b/gen/org/open_power/Inventory/Decorator/meson.build
@@ -2,13 +2,13 @@
 subdir('Asset')
 generated_others += custom_target(
     'org/open_power/Inventory/Decorator/Asset__markdown'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Inventory/Decorator/Asset.interface.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Inventory/Decorator/Asset.interface.yaml',  ],
     output: [ 'Asset.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/Inventory/Decorator/Asset',
     ],
     build_by_default: true,
diff --git a/gen/org/open_power/Logging/PEL/meson.build b/gen/org/open_power/Logging/PEL/meson.build
index b39f5fd..bac74e2 100644
--- a/gen/org/open_power/Logging/PEL/meson.build
+++ b/gen/org/open_power/Logging/PEL/meson.build
@@ -1,13 +1,13 @@
 # Generated file; do not modify.
 generated_sources += custom_target(
     'org/open_power/Logging/PEL__cpp'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Logging/PEL.interface.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Logging/PEL.interface.yaml',  ],
     output: [ 'server.cpp', 'server.hpp', 'client.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/Logging/PEL',
     ],
 )
diff --git a/gen/org/open_power/Logging/meson.build b/gen/org/open_power/Logging/meson.build
index 64eee43..5132c2f 100644
--- a/gen/org/open_power/Logging/meson.build
+++ b/gen/org/open_power/Logging/meson.build
@@ -2,13 +2,13 @@
 subdir('PEL')
 generated_others += custom_target(
     'org/open_power/Logging/PEL__markdown'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Logging/PEL.interface.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Logging/PEL.interface.yaml',  ],
     output: [ 'PEL.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/Logging/PEL',
     ],
     build_by_default: true,
diff --git a/gen/org/open_power/OCC/PassThrough/meson.build b/gen/org/open_power/OCC/PassThrough/meson.build
index 946dc58..229a82f 100644
--- a/gen/org/open_power/OCC/PassThrough/meson.build
+++ b/gen/org/open_power/OCC/PassThrough/meson.build
@@ -1,13 +1,13 @@
 # Generated file; do not modify.
 generated_sources += custom_target(
     'org/open_power/OCC/PassThrough__cpp'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/OCC/PassThrough.interface.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/OCC/PassThrough.interface.yaml',  ],
     output: [ 'server.cpp', 'server.hpp', 'client.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/OCC/PassThrough',
     ],
 )
diff --git a/gen/org/open_power/OCC/Status/meson.build b/gen/org/open_power/OCC/Status/meson.build
index 3ee4d09..30a0c70 100644
--- a/gen/org/open_power/OCC/Status/meson.build
+++ b/gen/org/open_power/OCC/Status/meson.build
@@ -1,13 +1,13 @@
 # Generated file; do not modify.
 generated_sources += custom_target(
     'org/open_power/OCC/Status__cpp'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/OCC/Status.interface.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/OCC/Status.interface.yaml',  ],
     output: [ 'server.cpp', 'server.hpp', 'client.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/OCC/Status',
     ],
 )
diff --git a/gen/org/open_power/OCC/meson.build b/gen/org/open_power/OCC/meson.build
index 2effb8a..70d9c72 100644
--- a/gen/org/open_power/OCC/meson.build
+++ b/gen/org/open_power/OCC/meson.build
@@ -2,13 +2,13 @@
 subdir('PassThrough')
 generated_others += custom_target(
     'org/open_power/OCC/PassThrough__markdown'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/OCC/PassThrough.interface.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/OCC/PassThrough.interface.yaml',  ],
     output: [ 'PassThrough.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/OCC/PassThrough',
     ],
     build_by_default: true,
@@ -17,13 +17,13 @@
 subdir('Status')
 generated_others += custom_target(
     'org/open_power/OCC/Status__markdown'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/OCC/Status.interface.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/OCC/Status.interface.yaml',  ],
     output: [ 'Status.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/OCC/Status',
     ],
     build_by_default: true,
diff --git a/gen/org/open_power/Proc/FSI/meson.build b/gen/org/open_power/Proc/FSI/meson.build
index 19f8bdd..72fb7c3 100644
--- a/gen/org/open_power/Proc/FSI/meson.build
+++ b/gen/org/open_power/Proc/FSI/meson.build
@@ -1,13 +1,13 @@
 # Generated file; do not modify.
 generated_sources += custom_target(
     'org/open_power/Proc/FSI__cpp'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Proc/FSI.errors.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Proc/FSI.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/Proc/FSI',
     ],
 )
diff --git a/gen/org/open_power/Proc/meson.build b/gen/org/open_power/Proc/meson.build
index 5ee8c64..0914954 100644
--- a/gen/org/open_power/Proc/meson.build
+++ b/gen/org/open_power/Proc/meson.build
@@ -2,13 +2,13 @@
 subdir('FSI')
 generated_others += custom_target(
     'org/open_power/Proc/FSI__markdown'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Proc/FSI.errors.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Proc/FSI.errors.yaml',  ],
     output: [ 'FSI.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/Proc/FSI',
     ],
     build_by_default: true,
diff --git a/gen/org/open_power/Sensor/Aggregation/History/Average/meson.build b/gen/org/open_power/Sensor/Aggregation/History/Average/meson.build
index 8b4c869..3f11784 100644
--- a/gen/org/open_power/Sensor/Aggregation/History/Average/meson.build
+++ b/gen/org/open_power/Sensor/Aggregation/History/Average/meson.build
@@ -1,13 +1,13 @@
 # Generated file; do not modify.
 generated_sources += custom_target(
     'org/open_power/Sensor/Aggregation/History/Average__cpp'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Sensor/Aggregation/History/Average.interface.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Sensor/Aggregation/History/Average.interface.yaml',  ],
     output: [ 'server.cpp', 'server.hpp', 'client.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/Sensor/Aggregation/History/Average',
     ],
 )
diff --git a/gen/org/open_power/Sensor/Aggregation/History/Maximum/meson.build b/gen/org/open_power/Sensor/Aggregation/History/Maximum/meson.build
index 6bf6e23..9af0461 100644
--- a/gen/org/open_power/Sensor/Aggregation/History/Maximum/meson.build
+++ b/gen/org/open_power/Sensor/Aggregation/History/Maximum/meson.build
@@ -1,13 +1,13 @@
 # Generated file; do not modify.
 generated_sources += custom_target(
     'org/open_power/Sensor/Aggregation/History/Maximum__cpp'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Sensor/Aggregation/History/Maximum.interface.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Sensor/Aggregation/History/Maximum.interface.yaml',  ],
     output: [ 'server.cpp', 'server.hpp', 'client.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/Sensor/Aggregation/History/Maximum',
     ],
 )
diff --git a/gen/org/open_power/Sensor/Aggregation/History/meson.build b/gen/org/open_power/Sensor/Aggregation/History/meson.build
index 5771c9f..95b0232 100644
--- a/gen/org/open_power/Sensor/Aggregation/History/meson.build
+++ b/gen/org/open_power/Sensor/Aggregation/History/meson.build
@@ -2,13 +2,13 @@
 subdir('Average')
 generated_others += custom_target(
     'org/open_power/Sensor/Aggregation/History/Average__markdown'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Sensor/Aggregation/History/Average.interface.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Sensor/Aggregation/History/Average.interface.yaml',  ],
     output: [ 'Average.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/Sensor/Aggregation/History/Average',
     ],
     build_by_default: true,
@@ -17,13 +17,13 @@
 subdir('Maximum')
 generated_others += custom_target(
     'org/open_power/Sensor/Aggregation/History/Maximum__markdown'.underscorify(),
-    input: [ meson.source_root() / 'org/open_power/Sensor/Aggregation/History/Maximum.interface.yaml',  ],
+    input: [ meson.project_source_root() / 'org/open_power/Sensor/Aggregation/History/Maximum.interface.yaml',  ],
     output: [ 'Maximum.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/Sensor/Aggregation/History/Maximum',
     ],
     build_by_default: true,
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,