# tmux.Server.SetEnvironment

- **Module:** tmux.Server
- **Package:** github.com/libtmux/libtmux-go/tmux
- **Language:** Go
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-go/blob/5f808882015a975a65acc7f9da5b3ff0d5cbdc91/tmux/environment.go#L83
- **Page:** https://libtmux.org/reference/go/tmux-server-setenvironment/

```
tmux.Server.SetEnvironment(ctx: context.Context, name: string, value: string, options: SetEnvironmentOptions) -> error
```

SetEnvironment stores a value in the server's global tmux environment. ExpandFormat and Hidden select tmux flags; cancellation does not prove the value was not stored.