Mapping between simple class and class with inheritance

I have two classes like:

public class FileDto {
  private String name;
  private Integer size;
  private FileType fileType;
}

The second one is:

public class File extends AbstractFile {
  private String name;
  private Integer size;
}

Where

public class AbstractFile {
private FileConfiguration fileConfiguration;
}

And FileConfiguration has FileType:

public class FileConfiguration {
FileType fileType
}

Now I need to write three mappers using MapStruct:

The first one is easy and works fine - mapping from File to FileDto:

@Mapping(target = "fileType", source = "fileConfiguration.fileType")
  FileDto fromEntityToDto(final File entity);

The second one is from FileDto to File. I would like to try something like:

  @Mapping(target = "fileConfiguration.fileType", source = "fileType")
  File fromDtoToEntity(final FileDto dto);

But it give me an error:

error: incompatible types: FileConfigurationBuilder cannot be converted to FileConfiguration
            target.setFileConfiguration( FileConfiguration.builder() );

And the third is:

  @Mapping(target = "fileConfiguration.fileType", source = "fileType")
  File updateEntity(final FileDto dto, @MappingTarget final File target);

Could you tell me how can I put property target in @Mapping annotation? Or is there any other way?