nixpkgs/nixos/default.nix
Bjørn Forsman 72d906a0ea nixos: fix "nixos-rebuild build-vm-with-bootloader" for EFI systems
(The first version of this change, in commit 39fad297fd, broke
`nix-build -A nixosTests.installer.simpleUefiSystemdBoot`. This is the
2nd version, which hopefully does not break anything.)

`nixos-rebuild build-vm-with-bootloader` currently fails with the
default NixOS EFI configuration:

  $ cat >configuration.nix <<EOF
  {
    fileSystems."/".device = "/dev/sda1";
    boot.loader.systemd-boot.enable = true;
    boot.loader.efi.canTouchEfiVariables = true;
  }
  EOF

  $ nixos-rebuild build-vm-with-bootloader -I nixos-config=$PWD/configuration.nix -I nixpkgs=https://github.com/NixOS/nixpkgs/archive/nixos-20.09.tar.gz
  [...]
  insmod: ERROR: could not insert module /nix/store/1ibmgfr13r8b6xyn4f0wj115819f359c-linux-5.4.83/lib/modules/5.4.83/kernel/fs/efivarfs/efivarfs.ko.xz: No such device
  mount: /sys/firmware/efi/efivars: mount point does not exist.
  [    1.908328] reboot: Power down
  builder for '/nix/store/dx2ycclyknvibrskwmii42sgyalagjxa-nixos-boot-disk.drv' failed with exit code 32
  [...]

Fix it by setting virtualisation.useEFIBoot = true when needed.

Before:
* release-20.03: successful build, unsuccessful run
* release-20.09 (and master): unsuccessful build

After:
* Successful build and run.

Fixes #107255
2021-01-08 19:36:10 +01:00

44 lines
1 KiB
Nix

{ configuration ? import ./lib/from-env.nix "NIXOS_CONFIG" <nixos-config>
, system ? builtins.currentSystem
}:
let
eval = import ./lib/eval-config.nix {
inherit system;
modules = [ configuration ];
};
# This is for `nixos-rebuild build-vm'.
vmConfig = (import ./lib/eval-config.nix {
inherit system;
modules = [ configuration ./modules/virtualisation/qemu-vm.nix ];
}).config;
# This is for `nixos-rebuild build-vm-with-bootloader'.
vmWithBootLoaderConfig = (import ./lib/eval-config.nix {
inherit system;
modules =
[ configuration
./modules/virtualisation/qemu-vm.nix
{ virtualisation.useBootLoader = true; }
({ config, ... }: {
virtualisation.useEFIBoot =
config.boot.loader.systemd-boot.enable ||
config.boot.loader.efi.canTouchEfiVariables;
})
];
}).config;
in
{
inherit (eval) pkgs config options;
system = eval.config.system.build.toplevel;
vm = vmConfig.system.build.vm;
vmWithBootLoader = vmWithBootLoaderConfig.system.build.vm;
}