From c96bce297517b32b3c69e3928109642048ee8b40 Mon Sep 17 00:00:00 2001
From: Raito Bezarius <masterancpp@gmail.com>
Date: Sun, 30 Jun 2024 14:15:30 +0200
Subject: [PATCH] fix: pin kernel to 6.7.5
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6.7.6, 6.7.7 are not working for unknown reasons
even though a previous NixOS stable 23.11 revision with 6.7.7 worked…

Let's keep it that way for now, pending bisection between 6.7.5..6.7.6.

Signed-off-by: Raito Bezarius <masterancpp@gmail.com>
---
 flake.lock     |  8 ++++----
 flake.nix      |  4 ++--
 hosts/epyc.nix | 11 +++++------
 3 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/flake.lock b/flake.lock
index 7da0e69..061d91c 100644
--- a/flake.lock
+++ b/flake.lock
@@ -304,17 +304,17 @@
     },
     "nixpkgs-for-kernel": {
       "locked": {
-        "lastModified": 1709742294,
-        "narHash": "sha256-8iPomMqw7grXVsugMJhsnHdbre8LnXOQUtHtMXRaWqc=",
+        "lastModified": 1708680708,
+        "narHash": "sha256-K2SxCGk13nLOFMeNG1RjzFDrh513VtzFzFhp0NsnJRY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "56051fbe049bf39adc1f08eb51740c226a4c3b90",
+        "rev": "593000b7d1e21cd84c7ecd965a64916b0982b202",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "56051fbe049bf39adc1f08eb51740c226a4c3b90",
+        "rev": "593000b7d1e21cd84c7ecd965a64916b0982b202",
         "type": "github"
       }
     },
diff --git a/flake.nix b/flake.nix
index 2b4a8f9..1df1785 100644
--- a/flake.nix
+++ b/flake.nix
@@ -11,8 +11,8 @@
     flake-parts.inputs.nixpkgs-lib.follows = "nixpkgs";
 
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
-    # contains kernel 6.7.7, do not update
-    nixpkgs-for-kernel.url = "github:NixOS/nixpkgs/56051fbe049bf39adc1f08eb51740c226a4c3b90";
+    # contains kernel 6.7.5, do not update
+    nixpkgs-for-kernel.url = "github:NixOS/nixpkgs/593000b7d1e21cd84c7ecd965a64916b0982b202";
 
     nixos-hardware.url = "github:NixOS/nixos-hardware";
     nur.url = "github:nix-community/NUR";
diff --git a/hosts/epyc.nix b/hosts/epyc.nix
index eb9e483..3c48294 100644
--- a/hosts/epyc.nix
+++ b/hosts/epyc.nix
@@ -1,7 +1,10 @@
 { inputs, lib, pkgs, ... }:
 let
   gcc-system-features = arch: lib.optionals (arch != null) ([ "gccarch-${arch}" ]
-    ++ map (x: "gccarch-${x}") lib.systems.architectures.inferiors.${arch});
+  ++ map (x: "gccarch-${x}") lib.systems.architectures.inferiors.${arch});
+  pkgsForKernel = import inputs.nixpkgs-for-kernel {
+    system = "x86_64-linux";
+  };
 in
 {
   imports = [
@@ -28,11 +31,7 @@ in
 
   # TODO: there's a critical bug on 6.8+ where btrfs won't mount the rootfs at all.
   # Do not upgrade until it is fixed. Ping Raito when needed.
-  boot.kernelPackages = let
-    pkgsForKernel = import inputs.nixpkgs-for-kernel {
-      system = "x86_64-linux";
-    };
-  in pkgsForKernel.linuxPackages_6_7;
+  boot.kernelPackages = pkgsForKernel.linuxPackages_6_7;
 
   # Open public access to our PostgreSQL.
   services.postgresql.enable = true;