{pkgs, config, ...}: let # This attribute is responsible for creating boot entries for # child configuration. They are only (directly) accessible # when the parent configuration is boot default. For example, # you can provide an easy way to boot the same configuration # as you use, but with another kernel # !!! fix this children = map (x: ((import ./system.nix) { platform = pkgs.system; configuration = x//{boot=((x.boot)//{grubDevice = "";});};}).system) config.nesting.children; systemBuilder = '' ensureDir $out ln -s ${config.boot.kernelPackages.kernel}/vmlinuz $out/kernel ln -s $grub $out/grub ln -s ${config.system.build.bootStage2} $out/init ln -s ${config.system.build.initialRamdisk}/initrd $out/initrd ln -s ${config.system.activationScripts.script} $out/activate ln -s ${config.system.build.etc}/etc $out/etc ln -s ${config.system.path} $out/sw ln -s ${pkgs.upstart} $out/upstart echo "$kernelParams" > $out/kernel-params echo "$configurationName" > $out/configuration-name echo "${toString pkgs.upstart.interfaceVersion}" > $out/upstart-interface-version mkdir $out/fine-tune childCount=0; for i in $children; do childCount=$(( childCount + 1 )); ln -s $i $out/fine-tune/child-$childCount; done cat > $out/menu.lst << GRUBEND kernel $kernel init=$bootStage2 $kernelParams initrd $initrd GRUBEND ensureDir $out/bin substituteAll ${./switch-to-configuration.sh} $out/bin/switch-to-configuration chmod +x $out/bin/switch-to-configuration ''; # Putting it all together. This builds a store path containing # symlinks to the various parts of the built configuration (the # kernel, the Upstart services, the init scripts, etc.) as well as a # script `switch-to-configuration' that activates the configuration # and makes it bootable. system = pkgs.stdenv.mkDerivation { name = "system"; buildCommand = systemBuilder; inherit children; inherit (pkgs) grub; grubDevice = config.boot.grubDevice; kernelParams = config.boot.kernelParams ++ config.boot.extraKernelParams; grubMenuBuilder = config.system.build.grubMenuBuilder; configurationName = config.boot.configurationName; # Most of these are needed by grub-install. path = [ pkgs.coreutils pkgs.gnused pkgs.gnugrep pkgs.findutils pkgs.diffutils pkgs.upstart # for initctl ]; }; in { system.build.system = system; }