Tools that Access or Modify the System Registry

In addition to files, tools on Windows might access or modify the system registry. Use the --emake-reg-roots command-line option to specify a key to mirror. You can specify more than one key by separating multiple entries with semicolons:

--emake-reg-roots=HKEY_LOCAL_MACHINE\Software\Foo; HKEY_LOCAL_MACHINE\Software\Bar

In addition, you can specify exception keys to not mirror the system registry by prefixing each key with a “ ” character. For example:

--emake-reg-roots=HKEY_LOCAL_MACHINE\Software\Foo; -HKEY_LOCAL_MACHINE\Software\Foo\Base

which mirrors all keys and values under Foo except the keys in Foo\Base.

To ensure compatibility with Microsoft Visual Studio, the registry root specification automatically includes:

HKEY_CLASSES_ROOT;-HKEY_CLASSES_ROOT\Installer; -HKEY_CLASSES_ROOT\Licenses

Registry mirroring supports only HKEY_LOCAL_MACHINE (HKLM) and HKEY_CLASSES_ROOT (HKCR) registry keys.