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Diffstat (limited to 'nixos/modules/system/boot/loader/grub/grub.nix')
-rw-r--r--nixos/modules/system/boot/loader/grub/grub.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/nixos/modules/system/boot/loader/grub/grub.nix b/nixos/modules/system/boot/loader/grub/grub.nix
index e84cdb3212c..cae045f78c3 100644
--- a/nixos/modules/system/boot/loader/grub/grub.nix
+++ b/nixos/modules/system/boot/loader/grub/grub.nix
@@ -503,7 +503,7 @@ in
             + "'boot.loader.grub.mirroredBoots' to make the system bootable.";
         }
         {
-          assertion = all (c: c < 2) (mapAttrsToList (_: c: c) bootDeviceCounters);
+          assertion = cfg.efiSupport || all (c: c < 2) (mapAttrsToList (_: c: c) bootDeviceCounters);
           message = "You cannot have duplicated devices in mirroredBoots";
         }
         {