Hi, after fixing yaml-cpp with https://build.opensuse.org/request/show/915135 I noticed, that we have a wonderful circular dependency between OpenImageIO and OpenColorIO. I solved it pragmatically by temporary defining Substitute: libOpenColorIO2_0 Ignore: libOpenColorIO2_0 in the project, in order to build the first stage of OpenImageIO. OpenShadingLanguage requires a complete build of both (cmake checks for iconvert binary) Cheers, Pete