add resque

hosts/lambdaos/rescue.nix

@@ -0,0 +1,26 @@
+{ pkgs, ... }:
+let
+  netboot = import (pkgs.path + "/nixos/lib/eval-config.nix") {
+    modules = [
+      (pkgs.path + "/nixos/modules/installer/netboot/netboot-minimal.nix")
+      module
+    ];
+  };
+  module = {
+    # you will want to add options here to support your filesystem
+    # and also maybe ssh to let you in
+    boot.supportedFilesystems = [ "zfs" ];
+  };
+in
+{
+  boot.loader.grub.extraEntries = ''
+    menuentry "Nixos Installer" {
+      linux ($drive1)/rescue-kernel init=${netboot.config.system.build.toplevel}/init ${toString netboot.config.boot.kernelParams}
+      initrd ($drive1)/rescue-initrd
+    }
+  '';
+  boot.loader.grub.extraFiles = {
+    "rescue-kernel" = "${netboot.config.system.build.kernel}/bzImage";
+    "rescue-initrd" = "${netboot.config.system.build.netbootRamdisk}/initrd";
+  };
+}