`cmakeFlags` silently dropped in `buildPythonPackage` stdenv

I am working on converting: cmakeFlags = lib.concatLists [ [ (lib.cmakeFeature "CMAKE_INSTALL_PREFIX" "${placeholder "out"}/${python.sitePackages}") ] [ (lib.cmakeBool "BUILD_MD" withMd) ] [ (lib.cmakeBool "BUILD_HPMC" withHpmc) ] [ (lib.cmakeBool "BUILD_METAL" withMetal) ] [ (lib.cmakeBool "BUILD_MPCD" withMpcd) ] [ (lib.cmakeBool "BUILD_TESTING" finalAttrs.doCheck) ] [ (lib.cmakeBool "ENABLE_MPI" withMpi) ] (lib.optional withMpi (lib.cmakeFeature ...