diff --git a/pkgs/games/stockfish/default.nix b/pkgs/games/stockfish/default.nix
index 5e8429f0336a..bdea1db9b3e9 100644
--- a/pkgs/games/stockfish/default.nix
+++ b/pkgs/games/stockfish/default.nix
@@ -4,20 +4,31 @@ let arch = if stdenv.isx86_64 then "x86-64" else
            if stdenv.isi686 then "x86-32" else
            "unknown";
 
-    version = "11";
+    version = "12";
+
+    nnueFile = "nn-82215d0fd0df.nnue";
+    nnue = fetchurl {
+      name = nnueFile;
+        url = "https://tests.stockfishchess.org/api/nn/${nnueFile}";
+      sha256 = "1r4yqrh4di05syyhl84hqcz84djpbd605b27zhbxwg6zs07ms8c2";
+    };
 in
 
 stdenv.mkDerivation {
-
   pname = "stockfish";
   inherit version;
 
   src = fetchurl {
     url = "https://github.com/official-stockfish/Stockfish/archive/sf_${version}.tar.gz";
-    sha256 = "16di83s79gf9kzdhcal5y0q9d59544gd5xqf1k8bwrqvc36628l0";
+    sha256 = "16980aicm5i6i9252239q4f9bcxg1gnqkv6nphrmpz4drg8i3v6i";
   };
 
-  postUnpack = "sourceRoot+=/src";
+  postUnpack = ''
+    sourceRoot+=/src
+    echo ${nnue}
+    cp "${nnue}" "$sourceRoot/${nnueFile}"
+  '';
+
   makeFlags = [ "PREFIX=$(out)" "ARCH=${arch}" ];
   buildFlags = [ "build" ];