Sigma repository for Fedora and EL.
sudo dnf copr enable ezamriy/sigma
sudo curl -o /etc/yum.repos.d/ezamriy-sigma-epel-7.repo https://copr.fedorainfracloud.org/coprs/ezamriy/sigma/repo/epel-7/ezamriy-sigma-epel-7.repo
This is a companion discussion topic for the original entry at https://copr.fedorainfracloud.org/coprs/ezamriy/sigma/