From 4d148268258732a216dc83327fe16073082d1063 Mon Sep 17 00:00:00 2001
From: Daniel Fullmer <danielrf12@gmail.com>
Date: Sat, 13 Jun 2020 23:22:20 -0400
Subject: [PATCH] qemu-vm: allow bootloader to set EFI vars

Without this, systemd-boot does not add an EFI boot entry for itself.
The reason it worked before this fix is because it would fall back to
the default installed \EFI\BOOT\BOOTX64.EFI
---
 nixos/modules/virtualisation/qemu-vm.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/nixos/modules/virtualisation/qemu-vm.nix b/nixos/modules/virtualisation/qemu-vm.nix
index 5a502c36180..c9061ea0608 100644
--- a/nixos/modules/virtualisation/qemu-vm.nix
+++ b/nixos/modules/virtualisation/qemu-vm.nix
@@ -210,6 +210,10 @@ let
           mkdir /boot
           mount /dev/vda2 /boot
 
+          ${optionalString config.boot.loader.efi.canTouchEfiVariables ''
+            mount -t efivarfs efivarfs /sys/firmware/efi/efivars
+          ''}
+
           # This is needed for GRUB 0.97, which doesn't know about virtio devices.
           mkdir /boot/grub
           echo '(hd0) /dev/vda' > /boot/grub/device.map