diff --git a/cvs/cli_plugins/copy_config_plugin.py b/cvs/cli_plugins/copy_config_plugin.py
index 3ff0abcb6..fcccabc19 100644
--- a/cvs/cli_plugins/copy_config_plugin.py
+++ b/cvs/cli_plugins/copy_config_plugin.py
@@ -1,5 +1,6 @@
 from .base import SubcommandPlugin
 from cvs.extension import ExtensionConfig
+from cvs.lib.utils_lib import cvs_package_root
 import os
 import shutil
 
@@ -49,8 +50,7 @@ def _find_config_root(self):
         1. Core cvs package (cvs/input/config_file, cvs/input/cluster_file, cvs/input/env_file)
         2. Extension packages configured via extension.ini (e.g., cvs_extension/input)
         """
-        plugin_dir = os.path.dirname(__file__)
-        cvs_dir = os.path.dirname(plugin_dir)  # cvs/
+        cvs_dir = cvs_package_root()
         config_root = os.path.join(cvs_dir, "input", "config_file")
         cluster_root = os.path.join(cvs_dir, "input", "cluster_file")
         env_root = os.path.join(cvs_dir, "input", "env_file")
diff --git a/cvs/lib/run_config_paths.py b/cvs/lib/run_config_paths.py
index 1987f0aac..eb44d3e21 100644
--- a/cvs/lib/run_config_paths.py
+++ b/cvs/lib/run_config_paths.py
@@ -31,10 +31,9 @@ def resolve_runner_results_base(run_config: dict) -> str:
 
 
 def _cvs_baseline_data_dir() -> str:
-    import cvs
+    from cvs.lib.utils_lib import cvs_package_root
 
-    root = os.path.dirname(os.path.abspath(cvs.__file__))
-    return os.path.normpath(os.path.join(root, "baseline_data"))
+    return os.path.normpath(os.path.join(cvs_package_root(), "baseline_data"))
 
 
 def resolve_baseline_csv_folder(run_config: dict) -> Optional[str]:
diff --git a/cvs/lib/unittests/test_utils_lib.py b/cvs/lib/unittests/test_utils_lib.py
index 842982941..d4fddd93b 100644
--- a/cvs/lib/unittests/test_utils_lib.py
+++ b/cvs/lib/unittests/test_utils_lib.py
@@ -1,7 +1,9 @@
 # cvs/lib/unittests/test_utils_lib.py
+import os
 import unittest
 from unittest.mock import patch
 
+import cvs
 import cvs.lib.utils_lib as utils_lib
 from cvs.parsers.schemas import AortaBenchmarkConfigFile
 
@@ -19,6 +21,13 @@ def test_scan_test_results_no_failure(self, mock_fail_test):
         utils_lib.scan_test_results(out_dict)
         mock_fail_test.assert_not_called()
 
+    def test_cvs_package_root_matches_cvs_module_directory(self):
+        expected = os.path.dirname(os.path.abspath(cvs.__file__))
+        self.assertEqual(utils_lib.cvs_package_root(), expected)
+
+    def test_cvs_package_root_contains_input_dir(self):
+        self.assertTrue(os.path.isdir(os.path.join(utils_lib.cvs_package_root(), 'input')))
+
 
 class TestResolveTestConfigPlaceholdersAorta(unittest.TestCase):
     """Aorta benchmark YAML uses the same resolver as other CVS test suites (see tests/benchmark/test_aorta.py)."""
diff --git a/cvs/lib/utils_lib.py b/cvs/lib/utils_lib.py
index 8208a07f2..55e2c811d 100644
--- a/cvs/lib/utils_lib.py
+++ b/cvs/lib/utils_lib.py
@@ -16,6 +16,18 @@
 log = globals.log
 
 
+def cvs_package_root():
+    """Absolute path to the installed/editable cvs package directory.
+
+    This is the root cvs/input/, cvs/tests/, cvs/baseline_data/, etc. hang off
+    of -- not the repo root and not the process cwd -- so it resolves the same
+    way whether cvs was pip-installed or run from an editable checkout.
+    """
+    import cvs
+
+    return os.path.dirname(os.path.abspath(cvs.__file__))
+
+
 def fail_test(msg):
     """
     Record and report a test failure without immediately raising an exception.