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-rw-r--r--nixos/modules/virtualisation/qemu-vm.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/nixos/modules/virtualisation/qemu-vm.nix b/nixos/modules/virtualisation/qemu-vm.nix
index 67fde55faabe7..0c2782d3e0274 100644
--- a/nixos/modules/virtualisation/qemu-vm.nix
+++ b/nixos/modules/virtualisation/qemu-vm.nix
@@ -845,7 +845,7 @@ in
         ''-append "$(cat ${config.system.build.toplevel}/kernel-params) init=${config.system.build.toplevel}/init regInfo=${regInfo}/registration ${consoles} $QEMU_KERNEL_PARAMS"''
       ])
       (mkIf cfg.useEFIBoot [
-        "-drive if=pflash,format=raw,unit=0,readonly,file=${efiFirmware}"
+        "-drive if=pflash,format=raw,unit=0,readonly=on,file=${efiFirmware}"
         "-drive if=pflash,format=raw,unit=1,file=$NIX_EFI_VARS"
       ])
       (mkIf (cfg.bios != null) [