diff --git a/pkgs/applications/audio/aacgain/default.nix b/pkgs/applications/audio/aacgain/default.nix
index 4d45de86f3a1..a89bb224a710 100644
--- a/pkgs/applications/audio/aacgain/default.nix
+++ b/pkgs/applications/audio/aacgain/default.nix
@@ -5,8 +5,6 @@
 , autoconf
 , automake
 , libtool
-, faad2
-, mp4v2
 }:
 
 stdenv.mkDerivation rec {
@@ -17,15 +15,10 @@ stdenv.mkDerivation rec {
     owner = "dgilman";
     repo = pname;
     rev = version;
-    sha256 = "sha256-9Y23Zh7q3oB4ha17Fpm1Hu2+wtQOA1llj6WDUAO2ARU=";
+    hash = "sha256-842+ueBSrTRs/e14d2LUd+uFi2qgJOYv+dswpC0lgIo=";
+    fetchSubmodules = true;
   };
 
-  postPatch = ''
-    cp -R ${faad2.src}/* 3rdparty/faad2
-    cp -R ${mp4v2.src}/* 3rdparty/mp4v2
-    chmod -R +w 3rdparty
-  '';
-
   nativeBuildInputs = [
     cmake
     autoconf