diff --git a/nixos/modules/installer/sd-card/sd-image-riscv64-qemu.nix b/nixos/modules/installer/sd-card/sd-image-riscv64-qemu.nix
index bd2722af8ab8..a3e30768da45 100644
--- a/nixos/modules/installer/sd-card/sd-image-riscv64-qemu.nix
+++ b/nixos/modules/installer/sd-card/sd-image-riscv64-qemu.nix
@@ -20,7 +20,7 @@
   };
 
   boot.consoleLogLevel = lib.mkDefault 7;
-  boot.kernelParams = ["console=tty0" "console=ttyS0,115200n8"];
+  boot.kernelParams = [ "console=tty0" "console=ttyS0,115200n8" ];
 
   sdImage = {
     populateFirmwareCommands = "";
diff --git a/nixos/modules/installer/sd-card/sd-image-x86_64.nix b/nixos/modules/installer/sd-card/sd-image-x86_64.nix
new file mode 100644
index 000000000000..b44c0a4eeca5
--- /dev/null
+++ b/nixos/modules/installer/sd-card/sd-image-x86_64.nix
@@ -0,0 +1,27 @@
+# To build, use:
+# nix-build nixos -I nixos-config=nixos/modules/installer/sd-card/sd-image-x86_64.nix -A config.system.build.sdImage
+
+# This image is primarily used in NixOS tests (boot.nix) to test `boot.loader.generic-extlinux-compatible`.
+{ config, lib, pkgs, ... }:
+
+{
+  imports = [
+    ../../profiles/base.nix
+    ./sd-image.nix
+  ];
+
+  boot.loader = {
+    grub.enable = false;
+    generic-extlinux-compatible.enable = true;
+  };
+
+  boot.consoleLogLevel = lib.mkDefault 7;
+
+  sdImage = {
+    populateFirmwareCommands = "";
+    populateRootCommands = ''
+      mkdir -p ./files/boot
+      ${config.boot.loader.generic-extlinux-compatible.populateCmd} -c ${config.system.build.toplevel} -d ./files/boot
+    '';
+  };
+}