system.activationScripts ‐ NixOS ‐ Searchix

system.activationScripts

A set of shell script fragments that are executed when a NixOS system configuration is activated. Examples are updating /etc, creating accounts, and so on. Since these are executed every time you boot the system or run nixos-rebuild, it's important that they are idempotent and fast.

Type

attribute set of (string or (submodule))

Default

{ }

Example

{
  stdio = {
    # Run after /dev has been mounted
    deps = [ "specialfs" ];
    text =
      ''
        # Needed by some programs.
        ln -sfn /proc/self/fd /dev/fd
        ln -sfn /proc/self/fd/0 /dev/stdin
        ln -sfn /proc/self/fd/1 /dev/stdout
        ln -sfn /proc/self/fd/2 /dev/stderr
      '';
  };
}

Declared