Otherwise a system OpenEXRConfig.cmake may end up getting picked up, which operates differently.
@@ -369,7 +369,7 @@ package_option(TIFF "Enable support for loading .tif images.")
package_status(TIFF "libtiff")
# OpenEXR
-find_package(OpenEXR QUIET)
+find_package(OpenEXR QUIET MODULE)
package_option(OpenEXR "Enable support for loading .exr images.")