Package check result: NOTE Check: CRAN incoming feasibility, Result: Note_to_CRAN_maintainers Maintainer: ‘Jeroen Ooms ’ Check: compiled code, Result: NOTE File ‘curl/libs/curl.so’: Found non-API call to R: ‘R_new_custom_connection’ Compiled code should not call non-API entry points in R. See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual, and section ‘Moving into C API compliance’ for issues with the use of non-API entry points. No changes to worse in reverse depends.