diff --git a/nix/cluster-configuration.nix b/nix/cluster-configuration.nix
index 86be40d..bb3099c 100644
--- a/nix/cluster-configuration.nix
+++ b/nix/cluster-configuration.nix
@@ -6,6 +6,14 @@
   node = (builtins.head (builtins.filter (n: n.fqdn == fqdn) nodes));
   otherNodes = (builtins.filter (n: n.fqdn != fqdn) nodes);
 
+  # Pin for k8s packages. This is so that upagrading the system will not upgrade the k8s control or data planes.
+  k8spkgs = import (fetchGit {
+    name = "nixos-unstable-2019-04-12";
+    url = https://github.com/nixos/nixpkgs/;
+    rev = "1fc591f9a5bd1b016b5d66dfab29560073955a14";
+  }) {};
+
+
 in rec {
   imports =
     [ # Include the results of the hardware scan.
@@ -17,6 +25,7 @@
   boot.loader.grub.version = 2;
   boot.loader.grub.device = node.diskBoot;
 
+  boot.kernelPackages = pkgs.linuxPackages_5_1;
   boot.kernelParams = [ "boot.shell_on_fail" ];
 
   time.timeZone = "Europe/Warsaw";
@@ -49,6 +58,8 @@
     '';
     serviceConfig.Type = "oneshot";
   };
+  # Otherwise fetchGit nixpkgs pin fails.
+  systemd.services.nixos-upgrade.path = [ pkgs.git ];
 
   # Enable the OpenSSH daemon.
   services.openssh.enable = true;
@@ -107,6 +118,8 @@
   };
 
   services.kubernetes = {
+    # Pin to specific k8s package.
+    package = k8spkgs.kubernetes;
     roles = []; # We do not use any nixpkgs predefined roles for k8s. Instead,
                 # we enable k8s components manually.
 
@@ -209,5 +222,16 @@
         --cni-bin-dir=/opt/cni/bin
       '';
     };
+
+  };
+
+  # https://github.com/NixOS/nixpkgs/issues/60687
+  systemd.services.kube-control-plane-online = {
+    preStart = pkgs.lib.mkForce "";
+  };
+  # this seems to depend on flannel
+  # TODO(q3k): file issue
+  systemd.services.kubelet-online = {
+    script = pkgs.lib.mkForce "sleep 1";
   };
 }