depot/third_party/home-manager/docs/manual/usage/rollbacks.md

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# Rollbacks {#sec-usage-rollbacks}
While the `home-manager` tool does not explicitly support rollbacks at
the moment it is relatively easy to perform one manually. The steps to
do so are
1. Run `home-manager generations` to determine which generation you
wish to rollback to:
``` shell
$ home-manager generations
2018-01-04 11:56 : id 765 -> /nix/store/kahm1rxk77mnvd2l8pfvd4jkkffk5ijk-home-manager-generation
2018-01-03 10:29 : id 764 -> /nix/store/2wsmsliqr5yynqkdyjzb1y57pr5q2lsj-home-manager-generation
2018-01-01 12:21 : id 763 -> /nix/store/mv960kl9chn2lal5q8lnqdp1ygxngcd1-home-manager-generation
2017-12-29 21:03 : id 762 -> /nix/store/6c0k1r03fxckql4vgqcn9ccb616ynb94-home-manager-generation
2017-12-25 18:51 : id 761 -> /nix/store/czc5y6vi1rvnkfv83cs3rn84jarcgsgh-home-manager-generation
```
2. Copy the Nix store path of the generation you chose, e.g.,
/nix/store/mv960kl9chn2lal5q8lnqdp1ygxngcd1-home-manager-generation
for generation 763.
3. Run the `activate` script inside the copied store path:
``` shell
$ /nix/store/mv960kl9chn2lal5q8lnqdp1ygxngcd1-home-manager-generation/activate
Starting home manager activation
```