diff --git a/pxe-server/configuration.nix b/pxe-server/configuration.nix
index b6bbabf..5c823d0 100644
--- a/pxe-server/configuration.nix
+++ b/pxe-server/configuration.nix
@@ -117,9 +117,9 @@ in
     ];
     script = ''
       set -euo pipefail
-      kernel=$(nix build --no-link --no-write-lock-file --print-out-paths "${fleetRepo}#nixosConfigurations.installer-netboot.config.system.build.kernel")
-      initrd=$(nix build --no-link --no-write-lock-file --print-out-paths "${fleetRepo}#nixosConfigurations.installer-netboot.config.system.build.netbootRamdisk")
-      ipxeScript=$(nix build --no-link --no-write-lock-file --print-out-paths "${fleetRepo}#nixosConfigurations.installer-netboot.config.system.build.netbootIpxeScript")
+      kernel=$(nix build --no-link --no-write-lock-file --refresh --print-out-paths "${fleetRepo}#nixosConfigurations.installer-netboot.config.system.build.kernel")
+      initrd=$(nix build --no-link --no-write-lock-file --refresh --print-out-paths "${fleetRepo}#nixosConfigurations.installer-netboot.config.system.build.netbootRamdisk")
+      ipxeScript=$(nix build --no-link --no-write-lock-file --refresh --print-out-paths "${fleetRepo}#nixosConfigurations.installer-netboot.config.system.build.netbootIpxeScript")
 
       install -m 0644 "$kernel/bzImage" "${webroot}/bzImage"
       install -m 0644 "$initrd/initrd" "${webroot}/initrd"