diff --git a/nix/kernel-source.nix b/nix/kernel-source.nix
index 3075083..ab8ab47 100644
--- a/nix/kernel-source.nix
+++ b/nix/kernel-source.nix
@@ -25,21 +25,25 @@
 
 { pkgs
 , lib ? pkgs.lib
-, enableGdb
-, version
+, tag
+, version ? tag
 , sha256
+, source
+, ...
 }:
 let
   localVersion = "-ukci";
+  sources = {
+    mirror = "mirror://kernel/linux/kernel/v6.x/linux-${tag}.tar.xz";
+    linus = "https://github.com/torvalds/linux/archive/refs/tags/${tag}.tar.gz";
+  };
 in
 {
   kernelArgs = {
-    inherit enableGdb;
-
     inherit version;
     src =
       pkgs.fetchurl {
-        url = "mirror://kernel/linux/kernel/v6.x/linux-${version}.tar.xz";
+        url = sources.${source};
         inherit sha256;
       };
 
@@ -159,7 +163,9 @@ in
         ACPI = yes;
 
         ## BPF
-        DEBUG_INFO_DWARF4 = yes;
+        DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT = yes;
+        DEBUG_INFO_SPLIT = no;
+        DEBUG_INFO_REDUCED = no;
         DEBUG_INFO_BTF = yes;
         BPF_SYSCALL = yes;
         BPF_JIT = yes;
@@ -168,9 +174,6 @@ in
         # Debug FS is be enabled (done above) to show registered kprobes in /sys/kernel/debug: https://www.kernel.org/doc/html/latest/trace/kprobes.html#the-kprobes-debugfs-interface
         KPROBES = yes;
         KALLSYMS_ALL = yes;
-      } // lib.optionalAttrs enableGdb {
-        DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT = yes;
-        GDB_SCRIPTS = yes;
       };
 
     # Flags that get passed to generate-config.pl
diff --git a/nix/ukci.nix b/nix/ukci.nix
index 0bd79e5..8cfef06 100644
--- a/nix/ukci.nix
+++ b/nix/ukci.nix
@@ -5,13 +5,16 @@ localFlake:
   perSystem = { self', system, pkgs, ... }: {
     packages =
       let
-        sources = [{ name = "6.6lts"; version = "6.6.58"; sha256 = "sha256-59+B5YjXD6tew+w7sErFPVHwhg/DsexF4KQWegJomds="; }
-          { name = "6.1lts"; version = "6.1.113"; sha256 = "sha256-VK8QhxkvzFJQpCUUUf1hR2GFnT2WREncAjWOVYxEnjA="; }
-          { name = "6.11"; version = "6.11.5"; sha256 = "sha256-RxSFs7fy+2N72P49AJRMTBNcfY7gLzV/M2kLqrB1Kgc="; }];
+        sources = [
+          { name = "6.6lts"; tag = "6.6.58"; source = "mirror"; sha256 = "sha256-59+B5YjXD6tew+w7sErFPVHwhg/DsexF4KQWegJomds="; }
+          { name = "6.1lts"; tag = "6.1.113"; source = "mirror"; sha256 = "sha256-VK8QhxkvzFJQpCUUUf1hR2GFnT2WREncAjWOVYxEnjA="; }
+          { name = "6.11"; tag = "6.11.5"; source = "mirror"; sha256 = "sha256-RxSFs7fy+2N72P49AJRMTBNcfY7gLzV/M2kLqrB1Kgc="; }
+          { name = "6.12rc"; tag = "v6.12-rc5"; version = "6.12.0-rc5"; source = "linus"; sha256 = "sha256-AvTQCJKdjWKvKhzVhbTcWMDHpCeFVRW3gy7LNPbzhbE="; }
+        ];
         nixpkgs = localFlake.nixpkgs;
         configureKernel = pkgs.callPackage ./kernel-configure.nix { };
         buildKernel = pkgs.callPackage ./kernel-build.nix { };
-        kernelNixConfig = source: pkgs.callPackage ./kernel-source.nix { enableGdb = false; inherit (source) version sha256; };
+        kernelNixConfig = source: pkgs.callPackage ./kernel-source.nix source;
         kernels = map
           (source:
             let
@@ -33,7 +36,6 @@ localFlake:
                   src
                   modDirVersion
                   version
-                  enableGdb
                   kernelPatches
                   ;
                 inherit configfile nixpkgs;