diff --git a/systems/x86_64-linux/prefect/bootloader.nix b/systems/x86_64-linux/prefect/bootloader.nix
index ac54b3fa..2e23eef5 100644
--- a/systems/x86_64-linux/prefect/bootloader.nix
+++ b/systems/x86_64-linux/prefect/bootloader.nix
@@ -12,7 +12,7 @@ in
   boot = {
     zfs.devNodes = "/dev/";
     loader = {
-      grub.device = "/dev/sda";
+      grub.device = "/dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_21170924";
       grub.enable = true;
     };
     initrd = {
diff --git a/systems/x86_64-linux/prefect/default.nix b/systems/x86_64-linux/prefect/default.nix
index 2f50b107..c94b66dc 100644
--- a/systems/x86_64-linux/prefect/default.nix
+++ b/systems/x86_64-linux/prefect/default.nix
@@ -30,7 +30,7 @@
   fileSystems = {
     "/" = {
       fsType = "ext4";
-      device = "/dev/sda1";
+      device = "/dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_21170924-part1";
     };
   };