added X to yum_requirements -- so the import can work on Linux
added X to yum_requirements -- so the import can work on Linux

conda-forge/staged-recipes,jakirkham/staged-recipes,jakirkham/staged-recipes,ocefpaf/staged-recipes,ocefpaf/staged-recipes,johanneskoester/staged-recipes,conda-forge/staged-recipes,johanneskoester/staged-recipes