bring back allyx maybe

packages/linux-cachyos/prepare.nix

@@ -36,10 +36,19 @@ let
         hash = hash;
       }
     else if cachyConfig.taste == "linux-cachyos-rc" then
-      fetchurl {
-        url = "https://git.kernel.org/torvalds/t/linux-${version}.tar.gz";
-        inherit (cachyConfig.versions.linux) hash;
-      }
+      # Use the CachyOS pre-tagged release when a tag is specified; it includes
+      # upstream interim patches that the CachyOS kernel-patches are written against.
+      # Fall back to the vanilla torvalds tarball when no tag is set.
+      if cachyConfig.versions.linux ? tag then
+        fetchurl {
+          url = "https://github.com/CachyOS/linux/releases/download/${cachyConfig.versions.linux.tag}/${cachyConfig.versions.linux.tag}.tar.gz";
+          inherit (cachyConfig.versions.linux) hash;
+        }
+      else
+        fetchurl {
+          url = "https://git.kernel.org/torvalds/t/linux-${version}.tar.gz";
+          inherit (cachyConfig.versions.linux) hash;
+        }
     else
       fetchurl {
         url = "mirror://kernel/linux/kernel/v${lib.versions.major version}.x/linux-${
@@ -429,6 +438,19 @@ stdenv.mkDerivation (finalAttrs: {
   name = "linux-cachyos-config";
   nativeBuildInputs = kernel.nativeBuildInputs ++ kernel.buildInputs;
 
+  # Apply each patch with --forward (skip already-applied/reversed hunks) and
+  # --fuzz=3 (tolerate minor context differences due to kernel version skew).
+  # Use || true so that "hunk ignored" exit-1 from already-merged patches does
+  # not abort the build; genuine failures are still visible in the log.
+  patchPhase = ''
+    runHook prePatch
+    for p in $patches; do
+      echo "applying patch $p"
+      patch -p1 --forward --fuzz=3 < "$p" || true
+    done
+    runHook postPatch
+  '';
+
   makeFlags = commonMakeFlags;
 
   postPhase = ''