env-cli-1.0.2 is not a library.
env
Limited port of env utility
Usage
env 1.0.1
Executes program in a modified environment
USAGE: [OPTIONS] [NAME=VALUE]... [COMMAND [ARG]...]
OPTIONS:
-h, --help Prints this help information
-i, --ignore-environment Start with an empty environment
-C, --chdir <chdir> Changes working directory to specified one.
-u, --unset <unset> Remove variable from the environment