golang-github-namsral-flag-dev 1.7.4~alpha+git20170814.67f268f-3 (arm64 binary) in ubuntu impish

 Flag is a drop in replacement for Go's flag package with the addition to
 parse files and environment variables.
 .
 This library is a drop-in replacement of Go's native flag package that
 supports the third factor of the twelve-factor app methodology: storing
 the config in the environment.