check what OS we're running on
https://anaconda.org/bioconda/perl-devel-checkos/badges/version.svg
https://anaconda.org/bioconda/perl-devel-checkos/badges/latest_release_date.svg
https://anaconda.org/bioconda/perl-devel-checkos/badges/latest_release_relative_date.svg
https://anaconda.org/bioconda/perl-devel-checkos/badges/platforms.svg
https://anaconda.org/bioconda/perl-devel-checkos/badges/license.svg
https://anaconda.org/bioconda/perl-devel-checkos/badges/downloads.svg