SPI only: fixes to how we get certain boost and Python variants (#2249)
SPI only: fixes to how we get certain boost and Python variants (#2249)


lgritz/oiio,lgritz/oiio,OpenImageIO/oiio,OpenImageIO/oiio,lgritz/oiio,OpenImageIO/oiio,lgritz/oiio,OpenImageIO/oiio