From ebe4cee5b1aeed80c927e06dbb70efac5b137143 Mon Sep 17 00:00:00 2001
From: Vineet Kumar <git@vineetk.net>
Date: Wed, 21 Jan 2026 01:19:18 -0500
Subject: saklas: didn't realize it wasn't uefi

---
 epistemia/bootloader.scm | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/epistemia/bootloader.scm b/epistemia/bootloader.scm
index 90137a3..413b0d7 100644
--- a/epistemia/bootloader.scm
+++ b/epistemia/bootloader.scm
@@ -3,10 +3,9 @@
   #:use-module (guix gexp)
   #:use-module (guix utils)
   #:use-module (gnu bootloader)
-  #:use-module (gnu bootloader grub)
-  #:export (grub-zfs))
+  #:use-module (gnu bootloader grub))
 
-(define grub-zfs
+(define-public grub-zfs
   (bootloader
     (inherit grub-efi-bootloader)
     (name 'grub-zfs)
@@ -22,3 +21,21 @@
               "set root=(hd0,gpt2)")
              ((" /store/") 
               " /gnu/@/store/")))))))
+
+;; TODO combine into previous with an argument?
+(define-public grub-zfs-bios
+  (bootloader
+    (inherit grub-bootloader)
+    (name 'grub-zfs)
+    (installer
+     #~(lambda (bootloader targets mount-point)
+         (use-modules (guix build utils))
+         (let ((standard-installer #$(bootloader-installer grub-bootloader)))
+           (standard-installer bootloader targets mount-point))
+         (let ((grub-cfg (string-append mount-point "/boot/grub/grub.cfg")))
+           (chmod grub-cfg #o644)
+           (substitute* grub-cfg
+             (("search --label --set [^ ]+")
+              "set root=(hd0,gpt2)")
+             ((" /store/")
+              " /gnu/@/store/")))))))
-- 
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