diff --git a/flake.nix b/flake.nix
index e1e5ac5..caf51da 100644
--- a/flake.nix
+++ b/flake.nix
@@ -14,6 +14,8 @@
       timezone = "America/Chicago"; # select timezone
       locale = "en_US.UTF-8"; # select locale
       bootMode = "uefi"; # uefi or bios
+      bootMountPath = "/boot"; # mount path for efi boot partition; only used for uefi boot mode
+      grubDevice = ""; # device identifier for grub; only used for legacy (bios) boot mode
     };
 
     # ----- USER SETTINGS ----- #
diff --git a/install.sh b/install.sh
index 97ee9b7..cfe44f2 100755
--- a/install.sh
+++ b/install.sh
@@ -13,6 +13,8 @@ if [ -d /sys/firmware/efi/efivars ]; then
     sed -i "0,/bootMode.*=.*\".*\";/s//bootMode = \"uefi\";/" ~/.dotfiles/flake.nix
 else
     sed -i "0,/bootMode.*=.*\".*\";/s//bootMode = \"bios\";/" ~/.dotfiles/flake.nix
+    grubDevice=$(findmnt / | awk -F' ' '{ print $2 }' | sed 's/\[.*\]//g' | tail -n 1 | lsblk -no pkname | tail -n 1 )
+    sed -i "0,/grubDevice.*=.*\".*\";/s//grubDevice = \"\/dev\/$grubDevice\";/" ~/.dotfiles/flake.nix
 fi
 
 # Patch flake.nix with different username/name and remove email by default
diff --git a/profiles/homelab/base.nix b/profiles/homelab/base.nix
index c32ce2c..cfb8a96 100644
--- a/profiles/homelab/base.nix
+++ b/profiles/homelab/base.nix
@@ -28,9 +28,12 @@
   boot.kernelModules = [ "i2c-dev" "i2c-piix4" ];
 
   # Bootloader
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-  boot.loader.efi.efiSysMountPoint = "/boot";
+  # Use systemd-boot if uefi, default to grub otherwise
+  boot.loader.systemd-boot.enable = if (systemSettings.bootMode == "uefi") then true else false;
+  boot.loader.efi.canTouchEfiVariables = if (systemSettings.bootMode == "uefi") then true else false;
+  boot.loader.efi.efiSysMountPoint = systemSettings.bootMountPath; # does nothing if running bios rather than uefi
+  boot.loader.grub.enable = if (systemSettings.bootMode == "uefi") then false else true;
+  boot.loader.grub.device = systemSettings.grubDevice; # does nothing if running uefi rather than bios
 
   # Networking
   networking.hostName = systemSettings.hostname; # Define your hostname.
diff --git a/profiles/work/configuration.nix b/profiles/work/configuration.nix
index acf58c4..cf3e98f 100644
--- a/profiles/work/configuration.nix
+++ b/profiles/work/configuration.nix
@@ -49,7 +49,9 @@
   # Use systemd-boot if uefi, default to grub otherwise
   boot.loader.systemd-boot.enable = if (systemSettings.bootMode == "uefi") then true else false;
   boot.loader.efi.canTouchEfiVariables = if (systemSettings.bootMode == "uefi") then true else false;
-  boot.loader.efi.efiSysMountPoint = "/boot"; # does nothing if running bios rather than uefi
+  boot.loader.efi.efiSysMountPoint = systemSettings.bootMountPath; # does nothing if running bios rather than uefi
+  boot.loader.grub.enable = if (systemSettings.bootMode == "uefi") then false else true;
+  boot.loader.grub.device = systemSettings.grubDevice; # does nothing if running uefi rather than bios
 
   # Networking
   networking.hostName = systemSettings.hostname; # Define your hostname.