diff --git a/setup.cfg b/setup.cfg
index b7d0f508..9f4bbbec 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -22,7 +22,7 @@ test_requires =
     coverage
     pytest
     pytest-cov
-packages = find:
+packages = find_namespace:
 include_package_data = True
 
 [versioneer]
diff --git a/setup.py b/setup.py
index 2d5e825a..b697c462 100755
--- a/setup.py
+++ b/setup.py
@@ -40,7 +40,8 @@
         'datalad_metalad.pipeline': 'datalad_metalad/pipeline'
     },
     package_data={
-        'datalad_metalad.pipeline': ['pipelines/*.json']
+        'datalad_metalad.pipeline': ['pipelines/*.json'],
+        'datalad_metalad.extractors.legacy.tests': ['data/*']
     },
     entry_points={
         'datalad.extensions': [