From 4e3542ce03f36e580e69b6c37d815cf7ea532da6 Mon Sep 17 00:00:00 2001
From: Sergey Kazenyuk <kazenyuk@pm.me>
Date: Fri, 6 Sep 2024 03:39:43 +0300
Subject: [PATCH 1/2] gpt: add partition attributes

---
 lib/types/gpt.nix | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/lib/types/gpt.nix b/lib/types/gpt.nix
index cb5e2b49..611494de 100644
--- a/lib/types/gpt.nix
+++ b/lib/types/gpt.nix
@@ -57,6 +57,27 @@ in
                   or a fully specified GUID (see https://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs).
                 '';
               };
+              attributes = lib.mkOption {
+                type = lib.types.listOf lib.types.int;
+                default = [ ];
+                description = ''
+                  GPT partition entry attributes, according to UEFI specification 
+                  2.10 (see https://uefi.org/specs/UEFI/2.10_A/05_GUID_Partition_Table_Format.html#defined-gpt-partition-entry-attributes)
+                  and `sgdisk`s man page:
+
+                  - 0: Required Partition (`sgdisk`: system partition)
+                  - 1: No Block IO Protocol (`sgdisk`: hide from EFI)
+                  - 2: Legacy BIOS Bootable
+                  - 3-47: Undefined and must be zero, reserved for future use
+                  - 48-63: Reserved for GUID specific use. The use of these bits 
+                    will vary depending on the partition type
+
+                  `sgdisk` describes some of the GUID-specific bits this way:
+                  - 60: read only
+                  - 62: hidden
+                  - 63: do not automount
+                '';
+              };
               device = lib.mkOption {
                 type = lib.types.str;
                 default =
@@ -268,6 +289,14 @@ in
               }" \
               --change-name="${toString partition._index}:${partition.label}" \
               --typecode=${toString partition._index}:${partition.type} \
+              --attributes=${toString partition._index}:=:0 \
+              ${
+                lib.concatStringsSep " \\\n" (
+                  builtins.map (bitNumber: "--attributes=${toString partition._index}:set:${toString bitNumber}") (
+                    lib.unique partition.attributes
+                  )
+                )
+              } \
               "${config.device}" \
             '';
             createArgs = ''

From c56f45eceea173c6c7d6cf9d262a2b88c17f5820 Mon Sep 17 00:00:00 2001
From: Yifei Sun <ysun@hey.com>
Date: Sun, 7 Sep 2025 15:29:18 +0200
Subject: [PATCH 2/2] examples: gpt partition attributes

cherry-picked from https://github.com/nvmd/disko/commit/9dc58d4d49c9f74623a06e2fc20cdfd8bb3cbe8b

usage example:

- set attribute: https://github.com/nvmd/nixos-raspberrypi-demo/blob/2847963e7555fc412c1d0f37bb48c761e78f350d/disko-nvme-zfs.nix#L9L11
- check: https://github.com/nvmd/nixos-raspberrypi-demo/blob/2847963e7555fc412c1d0f37bb48c761e78f350d/flake.nix#L154L160
---
 example/gpt-bios-compat.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/example/gpt-bios-compat.nix b/example/gpt-bios-compat.nix
index 4be1942b..d3955ebf 100644
--- a/example/gpt-bios-compat.nix
+++ b/example/gpt-bios-compat.nix
@@ -11,6 +11,7 @@
             boot = {
               size = "1M";
               type = "EF02"; # for grub MBR
+              attributes = [ 0 ]; # partition attribute
             };
             root = {
               size = "100%";