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This creates the `.drv` file that `nixos-rebuild build` would build. | This creates the `.drv` file that `nixos-rebuild build` would build. | ||
=== Manually switching a NixOS system to a certain version of system closure === | |||
(''Or:'' What <code>nixos-rebuild</code> does under the hoods.) | |||
Step 1: Do this for the equivalent of <code>nixos-rebuild boot</code> or <code>nixos-rebuild switch</code>, i.e. if you want the changes to persist after reboot: | |||
If you have the store path, run this, replacing <code>$systemClosure</code> with store path to your system closure: | |||
<syntaxHighlight lang="console"> | |||
$ nix-env --profile /nix/var/nix/profiles/system --set $systemClosure | |||
</syntaxHighlight> | |||
Or, if it was a previous generation, you can run this instead, replacing <code>$generation</code> with the desired generation number: | |||
<syntaxHighlight lang="console"> | |||
$ nix-env --profile /nix/var/nix/profiles/system --switch-generation $generation | |||
</syntaxHighlight> | |||
Step 2: Do this for all changes: | |||
Run this, replacing <code>$systemClosure</code> with store path to your system closure, and <code>$action</code> with the action (one of <code>boot</code>, <code>switch</code>, <code>test</code>): | |||
<syntaxHighlight lang="console"> | |||
$ $systemClosure/bin/switch-to-configuration $action | |||
</syntaxHighlight> | |||
=== Building a service as a VM (for testing) === | === Building a service as a VM (for testing) === | ||