diff --git a/tools/projmgr/include/ProjMgrYamlEmitter.h b/tools/projmgr/include/ProjMgrYamlEmitter.h
index d07b3e238..f8d99f406 100644
--- a/tools/projmgr/include/ProjMgrYamlEmitter.h
+++ b/tools/projmgr/include/ProjMgrYamlEmitter.h
@@ -114,7 +114,7 @@ class ProjMgrYamlEmitter {
   bool CompareFile(const std::string& filename, const YAML::Node& rootNode);
   bool CompareNodes(const YAML::Node& lhs, const YAML::Node& rhs);
   bool NeedRebuild(const std::string& filename, const YAML::Node& rootNode);
-  std::string EraseGeneratedByNode(const std::string& inStr);
+  void CopyWestGroups(const std::string& filename, YAML::Node rootNode);
 };
 
 #endif  // PROJMGRYAMLEMITTER_H
diff --git a/tools/projmgr/src/ProjMgrCbuild.cpp b/tools/projmgr/src/ProjMgrCbuild.cpp
index 6b0c96594..77ea93f60 100644
--- a/tools/projmgr/src/ProjMgrCbuild.cpp
+++ b/tools/projmgr/src/ProjMgrCbuild.cpp
@@ -570,6 +570,15 @@ void ProjMgrCbuild::SetDefineNode(YAML::Node define, const vector<string>& vec)
   }
 }
 
+void ProjMgrCbuild::SetWestNode(YAML::Node node, const ContextItem* context) {
+  SetNodeValue(node[YAML_PROJECT_ID], context->west.projectId);
+  SetNodeValue(node[YAML_APP_PATH], FormatPath(context->west.app, context->directories.cbuild));
+  SetNodeValue(node[YAML_BOARD], context->west.board);
+  SetNodeValue(node[YAML_DEVICE], context->west.device);
+  SetDefineNode(node[YAML_WEST_DEFS], context->west.westDefs);
+  SetNodeValue(node[YAML_WEST_OPT], context->west.westOpt);
+}
+
 //-- ProjMgrYamlEmitter::GenerateCbuild -----------------------------------------------------------
 bool ProjMgrYamlEmitter::GenerateCbuild(ContextItem* context,
   const string& generatorId, const string& generatorPack, bool ignoreRteFileMissing)
@@ -596,17 +605,21 @@ bool ProjMgrYamlEmitter::GenerateCbuild(ContextItem* context,
   }
   YAML::Node rootNode;
   ProjMgrCbuild cbuild(rootNode[rootKey], context, generatorId, generatorPack, ignoreRteFileMissing);
+  if (context->westOn) {
+    CopyWestGroups(filename, rootNode);
+  }
   RteFsUtils::CreateDirectories(RteFsUtils::ParentPath(filename));
   // get context rebuild flag
   context->needRebuild = NeedRebuild(filename, rootNode);
   return WriteFile(rootNode, filename, context->name);
 }
 
-void ProjMgrCbuild::SetWestNode(YAML::Node node, const ContextItem* context) {
-  SetNodeValue(node[YAML_PROJECT_ID], context->west.projectId);
-  SetNodeValue(node[YAML_APP_PATH], FormatPath(context->west.app, context->directories.cbuild));
-  SetNodeValue(node[YAML_BOARD], context->west.board);
-  SetNodeValue(node[YAML_DEVICE], context->west.device);
-  SetDefineNode(node[YAML_WEST_DEFS], context->west.westDefs);
-  SetNodeValue(node[YAML_WEST_OPT], context->west.westOpt);
+void ProjMgrYamlEmitter::CopyWestGroups(const string& filename, YAML::Node rootNode) {
+  if (!RteFsUtils::Exists(filename) || !RteFsUtils::IsRegularFile(filename)) {
+    return;
+  }
+  const YAML::Node& cbuildFile = YAML::LoadFile(filename);
+  if (cbuildFile[YAML_BUILD][YAML_GROUPS].IsDefined()) {
+    rootNode[YAML_BUILD][YAML_GROUPS] = cbuildFile[YAML_BUILD][YAML_GROUPS];
+  }
 }
diff --git a/tools/projmgr/src/ProjMgrYamlEmitter.cpp b/tools/projmgr/src/ProjMgrYamlEmitter.cpp
index 52baaac57..3c20ff202 100644
--- a/tools/projmgr/src/ProjMgrYamlEmitter.cpp
+++ b/tools/projmgr/src/ProjMgrYamlEmitter.cpp
@@ -87,17 +87,6 @@ bool ProjMgrYamlEmitter::WriteFile(YAML::Node& rootNode, const std::string& file
   return true;
 }
 
-string ProjMgrYamlEmitter::EraseGeneratedByNode(const string& inStr) {
-  size_t startIndex, endIndex;
-  string outStr = inStr;
-  startIndex = outStr.find(YAML_GENERATED_BY, 0);
-  endIndex = outStr.find('\n', startIndex);
-  if (startIndex != std::string::npos && endIndex != std::string::npos) {
-    outStr = outStr.erase(startIndex, endIndex - startIndex);
-  }
-  return outStr;
-};
-
 bool ProjMgrYamlEmitter::CompareFile(const string& filename, const YAML::Node& rootNode) {
   string inBuffer;
   if (!RteFsUtils::Exists(filename) || !RteFsUtils::ReadFile(filename, inBuffer)) {
@@ -105,8 +94,8 @@ bool ProjMgrYamlEmitter::CompareFile(const string& filename, const YAML::Node& r
   }
   YAML::Emitter emitter;
   const auto& outBuffer = string((emitter << rootNode).c_str()) + '\n';
-  return ProjMgrUtils::NormalizeLineEndings(EraseGeneratedByNode(inBuffer)) ==
-    ProjMgrUtils::NormalizeLineEndings(EraseGeneratedByNode(outBuffer));
+  return ProjMgrUtils::NormalizeLineEndings(inBuffer) ==
+    ProjMgrUtils::NormalizeLineEndings(outBuffer);
 }
 
 bool ProjMgrYamlEmitter::CompareNodes(const YAML::Node& lhs, const YAML::Node& rhs) {
@@ -118,8 +107,8 @@ bool ProjMgrYamlEmitter::CompareNodes(const YAML::Node& lhs, const YAML::Node& r
   rhsEmitter << rhs;
 
   // remove generated-by node from the string
-  lhsData = EraseGeneratedByNode(lhsEmitter.c_str());
-  rhsData = EraseGeneratedByNode(rhsEmitter.c_str());
+  lhsData = lhsEmitter.c_str();
+  rhsData = rhsEmitter.c_str();
 
   return (lhsData == rhsData) ? true : false;
 }
diff --git a/tools/projmgr/test/data/WestSupport/out/core0/CM0/Debug/core0.Debug+CM0.cbuild.yml b/tools/projmgr/test/data/WestSupport/out/core0/CM0/Debug/core0.Debug+CM0.cbuild.yml
new file mode 100644
index 000000000..7e3f491dc
--- /dev/null
+++ b/tools/projmgr/test/data/WestSupport/out/core0/CM0/Debug/core0.Debug+CM0.cbuild.yml
@@ -0,0 +1,8 @@
+build:
+  groups:
+    - group: sources
+      files:
+        - file: ../../../../src/main.c
+    - group: zephyr
+      files:
+        - file: ../../../../zephyr/utils.c
diff --git a/tools/projmgr/test/data/WestSupport/ref/core0.Debug+CM0.cbuild.yml b/tools/projmgr/test/data/WestSupport/ref/core0.Debug+CM0.cbuild.yml
index 27b032d6d..df1563be8 100644
--- a/tools/projmgr/test/data/WestSupport/ref/core0.Debug+CM0.cbuild.yml
+++ b/tools/projmgr/test/data/WestSupport/ref/core0.Debug+CM0.cbuild.yml
@@ -38,3 +38,10 @@ build:
       - CONFIG_BUILD_OUTPUT_HEX: y
       - TARGET-DEF: on
       - CONFIG-DEBUG: y
+  groups:
+    - group: sources
+      files:
+        - file: ../../../../src/main.c
+    - group: zephyr
+      files:
+        - file: ../../../../zephyr/utils.c