diff options
Diffstat (limited to 'nixos/modules')
| -rw-r--r-- | nixos/modules/installer/tools/tools.nix | 10 | ||||
| -rw-r--r-- | nixos/modules/misc/version.nix | 11 |
2 files changed, 15 insertions, 6 deletions
diff --git a/nixos/modules/installer/tools/tools.nix b/nixos/modules/installer/tools/tools.nix index e4db39b5c810..5df9c23e6b69 100644 --- a/nixos/modules/installer/tools/tools.nix +++ b/nixos/modules/installer/tools/tools.nix @@ -159,10 +159,12 @@ in # extraGroups = [ "wheel" ]; # Enable ‘sudo’ for the user. # }; - # This value determines the NixOS release with which your system is to be - # compatible, in order to avoid breaking some software such as database - # servers. You should change this only after NixOS release notes say you - # should. + # This value determines the NixOS release from which the default + # settings for stateful data, like file locations and database versions + # on your system were taken. It‘s perfectly fine and recommended to leave + # this value at the release version of the first install of this system. + # Before changing this value read the documentation for this option + # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html). system.stateVersion = "${config.system.nixos.release}"; # Did you read the comment? } diff --git a/nixos/modules/misc/version.nix b/nixos/modules/misc/version.nix index 0540b493003f..b85614771ee4 100644 --- a/nixos/modules/misc/version.nix +++ b/nixos/modules/misc/version.nix @@ -61,11 +61,18 @@ in configuration defaults in a way incompatible with stateful data. For instance, if the default version of PostgreSQL changes, the new version will probably be unable to read your - existing databases. To prevent such breakage, you can set the + existing databases. To prevent such breakage, you should set the value of this option to the NixOS release with which you want - to be compatible. The effect is that NixOS will option + to be compatible. The effect is that NixOS will use defaults corresponding to the specified release (such as using an older version of PostgreSQL). + It‘s perfectly fine and recommended to leave this value at the + release version of the first install of this system. + Changing this option will not upgrade your system. In fact it + is meant to stay constant exactly when you upgrade your system. + You should only bump this option, if you are sure that you can + or have migrated all state on your system which is affected + by this option. ''; }; |