build .so from boot libraries

Hi, I'm trying to run compiler plugins on the source code of GHC itself. (Has anyone done this before?) Somehow this forces the loading of .so files of boot libraries (like libHSterminfo-0.4.1.3.so and libHSghc-boot-th-8.9.so) during GHC's compilation. The .so files are not built at this stage (only in later stages) by default. Is there an option to create dynamically linked libraries from the boot libraries in stage 0? BR, Boldizsár