---
name: "nix-env-rollback"
section: "1"
platform: "linux"
package: "nix-bin"
version: "2.26.3+dfsg-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/nix-env-rollback"
---

# nix-env-rollback(1)

set user environment to previous generation

## Name

`nix-env --rollback` - set user environment to previous generation

## Synopsis

`nix-env` `--rollback`

## Description

This operation switches to the “previous” generation of the active profile, that is, the highest numbered generation lower than the current generation, if it exists. It is just a convenience wrapper around `--list-generations` and `--switch-generation`.

{{#include ./opt-common.md}}

{{#include ../opt-common.md}}

{{#include ./env-common.md}}

{{#include ../env-common.md}}

## Examples

```
$ nix-env --rollback
switching from generation 92 to 91
```

```
$ nix-env --rollback
error: no generation older than the current (91) exists
```