# session.settings.Session.unset_environment

- **Module:** session.settings.Session
- **Package:** libtmux
- **Language:** Rust
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-rs/blob/8a648c0894dfffc9303583f753b6c8ae01f2fe76/crates/libtmux/src/session/settings.rs#L476
- **Page:** https://libtmux.org/reference/rs/session-settings-session-unset_environment/

```
session.settings.Session.unset_environment(self, name: &str) -> Result<(), Error>
```

Remove an environment variable from the session.

# Errors

Returns an error when tmux rejects the name.