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

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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:

    $ 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:

    $ /nix/store/mv960kl9chn2lal5q8lnqdp1ygxngcd1-home-manager-generation/activate
Starting home manager activation
…