Merge pull request #281 from nix-community/zfs-latest

installer: add our own latestZfsCompatibleLinuxPackages

flake.lock

@@ -18,11 +18,11 @@
     },
     "nixos-unstable": {
       "locked": {
-        "lastModified": 1726658796,
-        "narHash": "sha256-SiiWCVg/W8i6jvpgQj3NNd3YtV+jfnn/t3Za7hfn1iE=",
+        "lastModified": 1726798147,
+        "narHash": "sha256-k/Ojv+MUDKUbj8JPd1MulJrf5BVz3jIUfrreMHbeTBE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "75ac2a58e988a346960938ab16cea903a3cb053a",
+        "rev": "e88358265511d3a73b30dc6e4c15579844b35280",
         "type": "github"
       },
       "original": {

nix/installer.nix

@@ -5,6 +5,10 @@
   ...
 }:
 {
+  imports = [
+    ./latest-zfs-kernel.nix
+    ./nix-settings.nix
+  ];
   # more descriptive hostname than just "nixos"
   networking.hostName = lib.mkDefault "nixos-installer";
 
@@ -16,7 +20,6 @@
 
   # use latest kernel we can support to get more hardware support
   boot.zfs.package = pkgs.zfsUnstable;
-  boot.kernelPackages = pkgs.zfsUnstable.latestCompatibleLinuxPackages;
 
   documentation.enable = false;
   documentation.man.man-db.enable = false;
@@ -33,10 +36,6 @@
     # alternative to nixos-generate-config
   ] ++ lib.optional (pkgs.lib.versionAtLeast lib.version "24.11") pkgs.nixos-facter;
 
-  imports = [
-    ./nix-settings.nix
-  ];
-
   # Don't add nixpkgs to the image to save space, for our intended use case we don't need it
   system.installer.channel.enable = false;
 }

nix/latest-zfs-kernel.nix

@@ -0,0 +1,26 @@
+{
+  lib,
+  pkgs,
+  config,
+  ...
+}:
+
+let
+  isUnstable = config.boot.zfs.package == pkgs.zfsUnstable;
+  zfsCompatibleKernelPackages = lib.filterAttrs (
+    name: kernelPackages:
+    (builtins.match "linux_[0-9]+_[0-9]+" name) != null
+    && (builtins.tryEval kernelPackages).success
+    && (
+      (!isUnstable && !kernelPackages.zfs.meta.broken)
+      || (isUnstable && !kernelPackages.zfs_unstable.meta.broken)
+    )
+  ) pkgs.linuxKernel.packages;
+  latestKernelPackage = lib.last (
+    lib.sort (a: b: (lib.versionOlder a.kernel.version b.kernel.version)) (builtins.attrValues zfsCompatibleKernelPackages)
+  );
+in
+{
+  # Note this might jump back and worth as kernel get added or removed.
+  boot.kernelPackages = latestKernelPackage;
+}