Firefox widevine

nixos/modules/firefox/aarch64-linux.nix

@@ -0,0 +1,19 @@
+{ pkgs, ... }:
+{
+ nixpkgs = {
+    overlays = [
+      (final: prev: {
+        firefox = prev.firefox.overrideAttrs (old: {
+          buildCommand =
+            old.buildCommand
+            + ''
+              mkdir -p $out/gmp-widevinecdm/system-installed
+              ln -s "${pkgs.widevine-cdm}/share/google/chrome/WidevineCdm/_platform_specific/linux_arm64/libwidevinecdm.so" $out/gmp-widevinecdm/system-installed/libwidevinecdm.so
+              ln -s "${pkgs.widevine-cdm}/share/google/chrome/WidevineCdm/manifest.json" $out/gmp-widevinecdm/system-installed/manifest.json
+              wrapProgram "$oldExe" \
+                      --set MOZ_GMP_PATH "$out/gmp-widevinecdm/system-installed"
+            '';
+        });
+    })];
+  };
+}

nixos/modules/firefox/default.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ lib, config, pkgs, hwconfig, ... }:
 
   let
     lock-false = {
@@ -11,6 +11,7 @@
     };
   in
 {
+  imports = [] ++ lib.optional (hwconfig.system == "aarch64-linux") ./aarch64-linux.nix;
   programs = {
     firefox = {
       enable = true;