$(MSBuildThisFileDirectory)\Wix\ $(ExternalsDir)\Wix\ $(Registry:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Installer XML\3.9@InstallRoot) $(Registry:HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Installer XML\3.9@InstallRoot) $(WixInstallPath)\Wix.targets