diff --git a/overlay/widevine-aarch64/default.nix b/overlay/widevine-aarch64/default.nix
index 8eddb6d..3b29b83 100644
--- a/overlay/widevine-aarch64/default.nix
+++ b/overlay/widevine-aarch64/default.nix
@@ -5,41 +5,44 @@
   python3,
   # Depends on kernel used, in kb
   pageSize ? 4,
-}:
-stdenv.mkDerivation {
-  pname = "widevine-aarch64-${toString pageSize}k";
-  version = "4.10.2662.3";
+}: let
+  lacrosVersion = "128.0.6613.119";
+  widevineVersion = "4.10.2662.3";
+in
+  stdenv.mkDerivation {
+    pname = "widevine-aarch64-${toString pageSize}k";
+    version = "4.10.2662.3";
 
-  srcs = fetchurl {
-    url = "https://commondatastorage.googleapis.com/chromeos-localmirror/distfiles/chromeos-lacros-arm64-squash-zstd-120.0.6098.0";
-    hash = "sha256-OKV8w5da9oZ1oSGbADVPCIkP9Y0MVLaQ3PXS3ZBLFXY=";
-  };
+    srcs = fetchurl {
+      url = "https://commondatastorage.googleapis.com/chromeos-localmirror/distfiles/chromeos-lacros-arm64-squash-zstd-${lacrosVersion}";
+      hash = "sha256-Q3g2npzSh9imzn36AR8EDWB5LS9MlhRBEqalNCLDxHI=";
+    };
 
-  unpackPhase = ":";
-  sourceRoot = ".";
+    unpackPhase = ":";
+    sourceRoot = ".";
 
-  buildPhase = ''
-    unsquashfs -q $srcs 'WidevineCdm/*'
-    env TARGET_PAGE_SIZE=${toString (pageSize * 1024)} python3 "${./widevine_fixup.py}" squashfs-root/WidevineCdm/_platform_specific/cros_arm64/libwidevinecdm.so libwidevinecdm.so
-  '';
+    buildPhase = ''
+      unsquashfs -q $srcs 'WidevineCdm/*'
+      env TARGET_PAGE_SIZE=${toString (pageSize * 1024)} python3 ${./widevine_fixup.py} squashfs-root/WidevineCdm/_platform_specific/cros_arm64/libwidevinecdm.so libwidevinecdm.so
+    '';
 
-  # TODO: systemwide install
-  installPhase = ''
-    install -d -m 0755 "$out"
-    install -p -m 0755 -t "$out" libwidevinecdm.so
-    install -p -m 0644 -t "$out" squashfs-root/WidevineCdm/manifest.json
-    install -p -m 0644 -t "$out" squashfs-root/WidevineCdm/LICENSE
+    # TODO: systemwide install
+    installPhase = ''
+      install -d -m 0755 "$out"
+      install -p -m 0755 -t "$out" libwidevinecdm.so
+      install -p -m 0644 -t "$out" squashfs-root/WidevineCdm/manifest.json
+      install -p -m 0644 -t "$out" squashfs-root/WidevineCdm/LICENSE
 
-    mkdir -p "$out/share/google/chrome/WidevineCdm/_platform_specific/linux_arm64"
-    mkdir -p "$out/share/google/chrome/WidevineCdm/_platform_specific/linux_x64"
-    # Hack because Chromium hardcodes a check for this right now...
-    touch "$out/share/google/chrome/WidevineCdm/_platform_specific/linux_x64/libwidevinecdm.so"
-    ln -sf ../../../../manifest.json "$out/share/google/chrome/WidevineCdm"
-    ln -sf ../../../../../../libwidevinecdm.so "$out/share/google/chrome/WidevineCdm/_platform_specific/linux_arm64/"
-  '';
+      mkdir -p "$out/share/google/chrome/WidevineCdm/_platform_specific/linux_arm64"
+      mkdir -p "$out/share/google/chrome/WidevineCdm/_platform_specific/linux_x64"
+      # Hack because Chromium hardcodes a check for this right now...
+      touch "$out/share/google/chrome/WidevineCdm/_platform_specific/linux_x64/libwidevinecdm.so"
+      ln -sf ../../../../manifest.json "$out/share/google/chrome/WidevineCdm"
+      ln -sf ../../../../../../libwidevinecdm.so "$out/share/google/chrome/WidevineCdm/_platform_specific/linux_arm64/"
+    '';
 
-  nativeBuildInputs = [
-    squashfsTools
-    python3
-  ];
-}
+    nativeBuildInputs = [
+      squashfsTools
+      python3
+    ];
+  }