diff --git a/Control/AthenaConfiguration/python/AllConfigFlags.py b/Control/AthenaConfiguration/python/AllConfigFlags.py
index c0cdc0ddf52c03e74e6c8c36a55223a797cd2141..e29dc1f944b814ff2cd618d95cffff639ee71c45 100644
--- a/Control/AthenaConfiguration/python/AllConfigFlags.py
+++ b/Control/AthenaConfiguration/python/AllConfigFlags.py
@@ -83,6 +83,12 @@ def _createCfgFlags():
         return createSimConfigFlags()
     _addFlagsCategory (acf, "Sim", __simulation, 'G4AtlasApps' )
 
+#Overlay Flags:
+    def __overlay():
+        from OverlayConfiguration.OverlayConfigFlags import createOverlayConfigFlags
+        return createOverlayConfigFlags()
+    _addFlagsCategory(acf, "Overlay", __overlay, 'OverlayConfiguration' )
+
 #Geo Model Flags:
     acf.addFlag('GeoModel.Layout', 'atlas') # replaces global.GeoLayout
     acf.addFlag("GeoModel.AtlasVersion", lambda prevFlags : GetFileMD(prevFlags.Input.Files).get("Geometry","ATLAS-R2-2016-01-00-01")) #
diff --git a/Control/AthenaConfiguration/python/testAllConfigFlags_RDO.py b/Control/AthenaConfiguration/python/testAllConfigFlags_RDO.py
index 3464da83e2547abe30529785f09e28d6180f517c..421936100bc83b3ff0074b14a0fa0fce5dabf333 100755
--- a/Control/AthenaConfiguration/python/testAllConfigFlags_RDO.py
+++ b/Control/AthenaConfiguration/python/testAllConfigFlags_RDO.py
@@ -15,6 +15,15 @@ except ImportError:
 if havesim:
     ConfigFlags._loadDynaFlags("Sim")
 
+# Don't fail just because OverlayConfiguration isn't present in this build.
+haveOverlay = True
+try:
+    import OverlayConfiguration # noqa: F401
+except ImportError:
+    haveOverlay = False
+if haveOverlay:
+    ConfigFlags._loadDynaFlags("Overlay")
+
 ConfigFlags.initAll()
 ConfigFlags.dump()
 
diff --git a/Event/EventOverlay/OverlayCommonAlgs/test/EventInfoOverlayLegacy_test.py b/Event/EventOverlay/OverlayCommonAlgs/test/EventInfoOverlayLegacy_test.py
index 9df87295c8710088d717a24fee7abb93fb16e8c4..4d2b8a4c975bdd92949182d085f972f4d8d34d6d 100755
--- a/Event/EventOverlay/OverlayCommonAlgs/test/EventInfoOverlayLegacy_test.py
+++ b/Event/EventOverlay/OverlayCommonAlgs/test/EventInfoOverlayLegacy_test.py
@@ -14,7 +14,6 @@ from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
 from AthenaConfiguration.TestDefaults import defaultTestFiles
 from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from OutputStreamAthenaPool.OutputStreamConfig import OutputStreamCfg
-from OverlayCommonAlgs.OverlayConfigFlags import createOverlayCfgFlags
 from OverlayCommonAlgs.EventInfoOverlayConfig import EventInfoCnvAlgCfg, EventInfoOverlayCfg
 
 # Set up logging and new style config
@@ -22,8 +21,6 @@ log.setLevel(DEBUG)
 Configurable.configurableRun3Behavior = True
 
 # Configure
-# ConfigFlags.join(createDigitizationCfgFlags())
-ConfigFlags.join(createOverlayCfgFlags())
 ConfigFlags.Input.Files = defaultTestFiles.RDO_BKG
 ConfigFlags.Input.SecondaryFiles = defaultTestFiles.HITS
 ConfigFlags.IOVDb.GlobalTag = "OFLCOND-MC16-SDR-16"
diff --git a/Event/EventOverlay/OverlayCommonAlgs/test/EventInfoOverlay_test.py b/Event/EventOverlay/OverlayCommonAlgs/test/EventInfoOverlay_test.py
index f74b8bb7b0aac92a7845d07cf73a4f8008a8ac91..7607f4a96ba7e305aacc8b75e5dd10522f7617f6 100755
--- a/Event/EventOverlay/OverlayCommonAlgs/test/EventInfoOverlay_test.py
+++ b/Event/EventOverlay/OverlayCommonAlgs/test/EventInfoOverlay_test.py
@@ -14,7 +14,6 @@ from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
 from AthenaConfiguration.TestDefaults import defaultTestFiles
 from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from OutputStreamAthenaPool.OutputStreamConfig import OutputStreamCfg
-from OverlayCommonAlgs.OverlayConfigFlags import createOverlayCfgFlags
 from OverlayCommonAlgs.EventInfoOverlayConfig import EventInfoCnvAlgCfg, EventInfoOverlayCfg
 
 # Set up logging and new style config
@@ -22,8 +21,6 @@ log.setLevel(DEBUG)
 Configurable.configurableRun3Behavior = True
 
 # Configure
-# ConfigFlags.join(createDigitizationCfgFlags())
-ConfigFlags.join(createOverlayCfgFlags())
 ConfigFlags.Input.Files = defaultTestFiles.RDO_BKG
 ConfigFlags.Input.SecondaryFiles = ["/cvmfs/atlas-nightlies.cern.ch/repo/data/data-art/OverlayMonitoringRTT/TestCase_xAODEventInfo.root"]
 ConfigFlags.IOVDb.GlobalTag = "OFLCOND-MC16-SDR-16"
diff --git a/InnerDetector/InDetDigitization/BCM_Digitization/test/BCM_DigitizationConfigNew_test.py b/InnerDetector/InDetDigitization/BCM_Digitization/test/BCM_DigitizationConfigNew_test.py
index 0575f83d9eb6b8d86f980efaedb9c8375cd14b8c..55a411a95494e6dd424b1f3edf380b1c3d66764a 100755
--- a/InnerDetector/InDetDigitization/BCM_Digitization/test/BCM_DigitizationConfigNew_test.py
+++ b/InnerDetector/InDetDigitization/BCM_Digitization/test/BCM_DigitizationConfigNew_test.py
@@ -13,7 +13,6 @@ from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
 from AthenaConfiguration.TestDefaults import defaultTestFiles
 from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from Digitization.DigitizationConfigFlags import createDigitizationCfgFlags
-from OverlayCommonAlgs.OverlayConfigFlags import createOverlayCfgFlags
 from BCM_Digitization.BCM_DigitizationConfigNew import BCM_DigitizationCfg
 
 # Set up logging and new style config
@@ -21,7 +20,6 @@ log.setLevel(DEBUG)
 Configurable.configurableRun3Behavior = True
 # Configure
 ConfigFlags.join(createDigitizationCfgFlags())
-ConfigFlags.join(createOverlayCfgFlags())
 ConfigFlags.Input.Files = defaultTestFiles.HITS
 ConfigFlags.Output.RDOFileName = "myRDO.pool.root"
 ConfigFlags.GeoModel.Align.Dynamic = False
diff --git a/InnerDetector/InDetDigitization/PixelDigitization/test/PixelDigitizationConfigNew_test.py b/InnerDetector/InDetDigitization/PixelDigitization/test/PixelDigitizationConfigNew_test.py
index 94c4e0b8bd1465f16fea8d23f25a9025fe35537d..5671e1f8cda1d1f3b84f11849f8cba7243cafe32 100755
--- a/InnerDetector/InDetDigitization/PixelDigitization/test/PixelDigitizationConfigNew_test.py
+++ b/InnerDetector/InDetDigitization/PixelDigitization/test/PixelDigitizationConfigNew_test.py
@@ -23,14 +23,12 @@ from PixelDigitization.PixelDigitizationConfigNew import (
     PixelDigitizationHSCfg, PixelDigitizationPUCfg, PixelDigitizationOverlayCfg,
 )
 from Digitization.DigitizationConfigFlags import createDigitizationCfgFlags
-from OverlayCommonAlgs.OverlayConfigFlags import createOverlayCfgFlags
 
 # Set up logging and new style config
 log.setLevel(DEBUG)
 Configurable.configurableRun3Behavior = True
 # Configure
 ConfigFlags.join(createDigitizationCfgFlags())
-ConfigFlags.join(createOverlayCfgFlags())
 ConfigFlags.Input.Files = defaultTestFiles.HITS
 ConfigFlags.IOVDb.GlobalTag = "OFLCOND-MC16-SDR-16"
 ConfigFlags.GeoModel.Align.Dynamic = False
diff --git a/InnerDetector/InDetDigitization/SCT_Digitization/test/SCT_DigitizationConfigNew_test.py b/InnerDetector/InDetDigitization/SCT_Digitization/test/SCT_DigitizationConfigNew_test.py
index 807153b9fdf55099898f656840185facb45fbdd9..99382fa8b661d2c30533db5a627d37bdd825bdd3 100755
--- a/InnerDetector/InDetDigitization/SCT_Digitization/test/SCT_DigitizationConfigNew_test.py
+++ b/InnerDetector/InDetDigitization/SCT_Digitization/test/SCT_DigitizationConfigNew_test.py
@@ -14,14 +14,12 @@ from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from AtlasGeoModel.InDetGMConfig import InDetGeometryCfg
 from SCT_Digitization.SCT_DigitizationConfigNew import SCT_DigitizationHSCfg
 from Digitization.DigitizationConfigFlags import createDigitizationCfgFlags
-from OverlayCommonAlgs.OverlayConfigFlags import createOverlayCfgFlags
 
 # Set up logging and new style config
 log.setLevel(DEBUG)
 Configurable.configurableRun3Behavior = True
 # Configure
 ConfigFlags.join(createDigitizationCfgFlags())
-ConfigFlags.join(createOverlayCfgFlags())
 ConfigFlags.Input.Files = defaultTestFiles.HITS
 ConfigFlags.IOVDb.GlobalTag = "OFLCOND-MC16-SDR-16"
 ConfigFlags.GeoModel.Align.Dynamic = False
diff --git a/InnerDetector/InDetDigitization/TRT_Digitization/test/TRT_DigitizationConfigNew_test.py b/InnerDetector/InDetDigitization/TRT_Digitization/test/TRT_DigitizationConfigNew_test.py
index 6d04981e1a7a4318e32020c6775f79ec073692b4..f45b643c1acd771b269f23cb9af93d8274f1e7c9 100755
--- a/InnerDetector/InDetDigitization/TRT_Digitization/test/TRT_DigitizationConfigNew_test.py
+++ b/InnerDetector/InDetDigitization/TRT_Digitization/test/TRT_DigitizationConfigNew_test.py
@@ -15,14 +15,12 @@ from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from AtlasGeoModel.InDetGMConfig import InDetGeometryCfg
 from TRT_Digitization.TRT_DigitizationConfigNew import TRT_DigitizationHSCfg
 from Digitization.DigitizationConfigFlags import createDigitizationCfgFlags
-from OverlayCommonAlgs.OverlayConfigFlags import createOverlayCfgFlags
 
 # Set up logging and new style config
 log.setLevel(DEBUG)
 Configurable.configurableRun3Behavior = True
 # Configure
 ConfigFlags.join(createDigitizationCfgFlags())
-ConfigFlags.join(createOverlayCfgFlags())
 ConfigFlags.Input.Files = defaultTestFiles.HITS
 ConfigFlags.IOVDb.GlobalTag = "OFLCOND-MC16-SDR-16"
 ConfigFlags.GeoModel.Align.Dynamic = False
diff --git a/InnerDetector/InDetRawAlgs/InDetOverlay/test/SCTOverlayConfig_test.py b/InnerDetector/InDetRawAlgs/InDetOverlay/test/SCTOverlayConfig_test.py
index 1530c47784092f6fac62c51b4651208b5e5a2bec..939e50c33a1f2d0687f26df57546df0b067c536b 100755
--- a/InnerDetector/InDetRawAlgs/InDetOverlay/test/SCTOverlayConfig_test.py
+++ b/InnerDetector/InDetRawAlgs/InDetOverlay/test/SCTOverlayConfig_test.py
@@ -12,7 +12,6 @@ from AthenaConfiguration.MainServicesConfig import MainServicesThreadedCfg
 from AthenaConfiguration.TestDefaults import defaultTestFiles
 from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from Digitization.DigitizationConfigFlags import createDigitizationCfgFlags
-from OverlayCommonAlgs.OverlayConfigFlags import createOverlayCfgFlags
 from OverlayCommonAlgs.OverlayCopyAlgsConfig import CopyMcEventCollectionCfg
 from InDetOverlay.SCTOverlayConfig import SCTOverlayCfg
 
@@ -23,7 +22,6 @@ nThreads = 1
 Configurable.configurableRun3Behavior = True
 
 ConfigFlags.join(createDigitizationCfgFlags())
-ConfigFlags.join(createOverlayCfgFlags())
 ConfigFlags.Input.Files = defaultTestFiles.RDO_BKG
 ConfigFlags.Input.SecondaryFiles = defaultTestFiles.HITS
 ConfigFlags.IOVDb.GlobalTag = "OFLCOND-MC16-SDR-16"
diff --git a/MuonSpectrometer/MuonDigitization/CSC_Digitization/test/CSC_DigitizationConfigNew_test.py b/MuonSpectrometer/MuonDigitization/CSC_Digitization/test/CSC_DigitizationConfigNew_test.py
index e8a4275eafb5a3929b2a39fa97966c66d146ab5f..6ef1d83b5f6a908c87c19ae55eb78c377b2e1202 100755
--- a/MuonSpectrometer/MuonDigitization/CSC_Digitization/test/CSC_DigitizationConfigNew_test.py
+++ b/MuonSpectrometer/MuonDigitization/CSC_Digitization/test/CSC_DigitizationConfigNew_test.py
@@ -11,7 +11,6 @@ from AthenaConfiguration.TestDefaults import defaultTestFiles
 from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
 from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from Digitization.DigitizationConfigFlags import createDigitizationCfgFlags
-from OverlayCommonAlgs.OverlayConfigFlags import createOverlayCfgFlags
 from AthenaConfiguration.AllConfigFlags import ConfigFlags
 from CSC_Digitization.CSC_DigitizationConfigNew import CSC_DigitBuilderCfg
 
@@ -23,7 +22,6 @@ ConfigFlags.Input.Files = defaultTestFiles.HITS
 ConfigFlags.Output.RDOFileName = "myRDO.pool.root"
 ConfigFlags.IOVDb.GlobalTag = "OFLCOND-MC16-SDR-16"
 ConfigFlags.join(createDigitizationCfgFlags())
-ConfigFlags.join(createOverlayCfgFlags())
 ConfigFlags.lock()
 # Function tests
 # Construct our accumulator to run
diff --git a/MuonSpectrometer/MuonDigitization/MDT_Digitization/test/MDT_DigitizationConfigNew_test.py b/MuonSpectrometer/MuonDigitization/MDT_Digitization/test/MDT_DigitizationConfigNew_test.py
index 8d315f05c3f450fc80f3783082f80008c27fd6c0..c02ea876efe32012a618c915ffe4d306dfa56d19 100755
--- a/MuonSpectrometer/MuonDigitization/MDT_Digitization/test/MDT_DigitizationConfigNew_test.py
+++ b/MuonSpectrometer/MuonDigitization/MDT_Digitization/test/MDT_DigitizationConfigNew_test.py
@@ -12,7 +12,6 @@ from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
 from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from AthenaConfiguration.AllConfigFlags import ConfigFlags
 from Digitization.DigitizationConfigFlags import createDigitizationCfgFlags
-from OverlayCommonAlgs.OverlayConfigFlags import createOverlayCfgFlags
 # MDT imports
 from MDT_Digitization.MDT_DigitizationConfigNew import MDT_DigitizerCfg
 # Set up logging and new style config
@@ -23,7 +22,6 @@ ConfigFlags.Input.Files = defaultTestFiles.HITS_SPECIAL
 ConfigFlags.Output.RDOFileName = "myRDO.pool.root"
 ConfigFlags.IOVDb.GlobalTag = "OFLCOND-MC16-SDR-16"
 ConfigFlags.join(createDigitizationCfgFlags())
-ConfigFlags.join(createOverlayCfgFlags())
 ConfigFlags.lock()
 # Construct our accumulator to run
 acc = MainServicesSerialCfg()
diff --git a/MuonSpectrometer/MuonDigitization/RPC_Digitization/test/RPC_DigitizationConfigNew_test.py b/MuonSpectrometer/MuonDigitization/RPC_Digitization/test/RPC_DigitizationConfigNew_test.py
index 66b438930d4158d823374be5fc1bd7a1853146f2..e15f9deb9f917861ed724c3b3a3ac00afd4a18d3 100755
--- a/MuonSpectrometer/MuonDigitization/RPC_Digitization/test/RPC_DigitizationConfigNew_test.py
+++ b/MuonSpectrometer/MuonDigitization/RPC_Digitization/test/RPC_DigitizationConfigNew_test.py
@@ -12,7 +12,6 @@ from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
 from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from AthenaConfiguration.AllConfigFlags import ConfigFlags
 from Digitization.DigitizationConfigFlags import createDigitizationCfgFlags
-from OverlayCommonAlgs.OverlayConfigFlags import createOverlayCfgFlags
 # RPC imports
 from RPC_Digitization.RPC_DigitizationConfigNew import (
     RPC_RangeToolCfg, RPC_DigitizationToolCfg, RPC_DigitizerCfg,
@@ -27,7 +26,6 @@ ConfigFlags.Input.Files = defaultTestFiles.HITS
 ConfigFlags.Output.RDOFileName = "myRDO.pool.root"
 ConfigFlags.IOVDb.GlobalTag = "OFLCOND-MC16-SDR-16"
 ConfigFlags.join(createDigitizationCfgFlags())
-ConfigFlags.join(createOverlayCfgFlags())
 ConfigFlags.lock()
 # Construct our accumulator to run
 acc = MainServicesSerialCfg()
diff --git a/MuonSpectrometer/MuonDigitization/TGC_Digitization/test/TGC_DigitizationConfigNew_test.py b/MuonSpectrometer/MuonDigitization/TGC_Digitization/test/TGC_DigitizationConfigNew_test.py
index 464aab67813e4ef0d1088ecef6a8d512cfd1a84a..4bb482664c64dff556da008020539808d7e9a84b 100755
--- a/MuonSpectrometer/MuonDigitization/TGC_Digitization/test/TGC_DigitizationConfigNew_test.py
+++ b/MuonSpectrometer/MuonDigitization/TGC_Digitization/test/TGC_DigitizationConfigNew_test.py
@@ -11,7 +11,6 @@ from AthenaConfiguration.TestDefaults import defaultTestFiles
 from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
 from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from Digitization.DigitizationConfigFlags import createDigitizationCfgFlags
-from OverlayCommonAlgs.OverlayConfigFlags import createOverlayCfgFlags
 from AthenaConfiguration.AllConfigFlags import ConfigFlags
 # TGC imports
 from TGC_Digitization.TGC_DigitizationConfigNew import (
@@ -27,7 +26,6 @@ ConfigFlags.Input.Files = defaultTestFiles.HITS
 ConfigFlags.Output.RDOFileName = "myRDO.pool.root"
 ConfigFlags.IOVDb.GlobalTag = "OFLCOND-MC16-SDR-16"
 ConfigFlags.join(createDigitizationCfgFlags())
-ConfigFlags.join(createOverlayCfgFlags())
 ConfigFlags.lock()
 # Construct our accumulator to run
 acc = MainServicesSerialCfg()
diff --git a/Simulation/Digitization/test/DigitizationConfigNew_test.py b/Simulation/Digitization/test/DigitizationConfigNew_test.py
index 6f7144709301992987c899d8815c7ff42e832fdc..9f6cdd9ab4b2c7b4b2c8b3c3661b5b2120d8562f 100755
--- a/Simulation/Digitization/test/DigitizationConfigNew_test.py
+++ b/Simulation/Digitization/test/DigitizationConfigNew_test.py
@@ -12,7 +12,6 @@ from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
 from AthenaConfiguration.TestDefaults import defaultTestFiles
 from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from Digitization.DigitizationConfigFlags import createDigitizationCfgFlags
-from OverlayCommonAlgs.OverlayConfigFlags import createOverlayCfgFlags
 from BCM_Digitization.BCM_DigitizationConfigNew import BCM_DigitizationCfg
 from SCT_Digitization.SCT_DigitizationConfigNew import SCT_DigitizationHSCfg
 from TRT_Digitization.TRT_DigitizationConfigNew import TRT_DigitizationHSCfg
@@ -29,7 +28,6 @@ log.setLevel(DEBUG)
 Configurable.configurableRun3Behavior = True
 # Configure
 ConfigFlags.join(createDigitizationCfgFlags())
-ConfigFlags.join(createOverlayCfgFlags())
 ConfigFlags.Input.Files = defaultTestFiles.HITS_SPECIAL
 ConfigFlags.Output.RDOFileName = "myRDO.pool.root"
 ConfigFlags.IOVDb.GlobalTag = "OFLCOND-MC16-SDR-16"
diff --git a/Simulation/Overlay/OverlayConfiguration/CMakeLists.txt b/Simulation/Overlay/OverlayConfiguration/CMakeLists.txt
new file mode 100644
index 0000000000000000000000000000000000000000..df74be0661b9d00dfcf75b59b65c6a8d11909218
--- /dev/null
+++ b/Simulation/Overlay/OverlayConfiguration/CMakeLists.txt
@@ -0,0 +1,16 @@
+################################################################################
+# Package: OverlayConfiguration
+################################################################################
+
+# Declare the package name:
+atlas_subdir( OverlayConfiguration )
+
+# External dependencies:
+
+# Install files from the package:
+atlas_install_python_modules( python/*.py )
+
+# Check python syntax:
+atlas_add_test( flake8
+   SCRIPT flake8 --select=ATL,F,E7,E9,W6 ${CMAKE_CURRENT_SOURCE_DIR}/python
+   POST_EXEC_SCRIPT nopost.sh )
diff --git a/Event/EventOverlay/OverlayCommonAlgs/python/OverlayConfigFlags.py b/Simulation/Overlay/OverlayConfiguration/python/OverlayConfigFlags.py
similarity index 81%
rename from Event/EventOverlay/OverlayCommonAlgs/python/OverlayConfigFlags.py
rename to Simulation/Overlay/OverlayConfiguration/python/OverlayConfigFlags.py
index 73ab8f4e00012eb903385f78e7a30237c8bba680..9c8060185c30e58b62fe4140632faf22e07c1ba5 100644
--- a/Event/EventOverlay/OverlayCommonAlgs/python/OverlayConfigFlags.py
+++ b/Simulation/Overlay/OverlayConfiguration/python/OverlayConfigFlags.py
@@ -1,10 +1,11 @@
-"""Construct ConfigFlags for Overlay
+"""Construct Overlay configuration flags
 
 Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
 """
+
 from AthenaConfiguration.AthConfigFlags import AthConfigFlags
 
-def createOverlayCfgFlags():
+def createOverlayConfigFlags():
     """Return an AthConfigFlags object with required flags"""
     flags = AthConfigFlags()
     # Data overlay flag
@@ -13,9 +14,6 @@ def createOverlayCfgFlags():
     flags.addFlag("Overlay.BkgPrefix", "Bkg_")
     # Overlay signal StoreGate key prefix
     flags.addFlag("Overlay.SigPrefix", "Sig_")
-    # Are we multithreaded?
-    flags.addFlag("Overlay.Legacy.MT", False)
     # Name of MC EvtStore to overlay
     flags.addFlag("Overlay.Legacy.EventStore", "BkgEvent_0_SG")
     return flags
-
diff --git a/Simulation/Overlay/OverlayConfiguration/python/__init__.py b/Simulation/Overlay/OverlayConfiguration/python/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391