diff --git a/murex.nix b/murex.nix
index e2224ec..d92d38a 100644
--- a/murex.nix
+++ b/murex.nix
@@ -13,10 +13,9 @@
     uboot.enable = true;
   };
 
-  # boot.kernelPackages = pkgs.linuxPackages_latest;
+  boot.kernelPackages = pkgs.linuxPackages_latest;
   # boot.kernelPackages = pkgs.linuxPackages_4_18;
-  # boot.kernelPackages = pkgs.linuxPackages_latest;
-  boot.kernelPackages = pkgs.linuxPackages_rpi;
+  # boot.kernelPackages = pkgs.linuxPackages_rpi;
 
   boot.kernelParams = [
     "cma=32M" # for virtual console, see https://nixos.wiki/wiki/NixOS_on_ARM
@@ -141,11 +140,11 @@
       Type = "oneshot";
       RemainAfterExit = "yes";
     };
-    script = ''
-      if echo 17 > /sys/class/gpio/export; then
-        echo high > /sys/class/gpio/gpio17/direction
+    script = let gpio = toString (458 + 17); in ''
+      if echo ${gpio} > /sys/class/gpio/export; then
+        echo high > /sys/class/gpio/gpio${gpio}/direction
       fi
-      chown octoprint:dialout /sys/class/gpio/gpio17/value
+      chown octoprint:dialout /sys/class/gpio/gpio${gpio}/value
     '';
   };
   users.users.${config.services.octoprint.user}.extraGroups = [