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This is needed to avoid this
https://github.com/mesonbuild/meson/issues/13774 when we go back to
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John Ericson 2024-10-10 12:04:33 -04:00
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34
doc/manual/src/command-ref/nix-env/rollback.md
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# 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
```console
$ nix-env --rollback
switching from generation 92 to 91
```
```console
$ nix-env --rollback
error: no generation older than the current (91) exists
```