diff --git a/default.nix b/default.nix
index 1cde119..e2ead1c 100644
--- a/default.nix
+++ b/default.nix
@@ -24,6 +24,9 @@ final: prev: {
     firered = prev.callPackage ./pokefirered { };
     firered-modern = prev.callPackage ./pokefirered { modern = true; };
 
+    emerald = prev.callPackage ./pokeemerald { };
+    emerald-modern = prev.callPackage ./pokeemerald { modern = true; };
+
     all = prev.callPackage ./pokeall { };
   };
 }
diff --git a/pokeemerald/default.nix b/pokeemerald/default.nix
new file mode 100644
index 0000000..9d80617
--- /dev/null
+++ b/pokeemerald/default.nix
@@ -0,0 +1,40 @@
+{ lib, stdenv, fetchFromGitHub, libpng, agbcc, gcc-arm-embedded, modern ? false }:
+
+stdenv.mkDerivation rec {
+  pname = "pokeemerald${lib.optionalString modern "-modern"}";
+  version = "unstable-2021-08-05";
+
+  src = fetchFromGitHub {
+    owner = "pret";
+    repo = "pokeemerald";
+    rev = "0e33df21b9cbc1f3f7f7bdb4efb9ae0d0c7728cf";
+    sha256 = "sha256-6Z0lZrZgAMDQMSbbHcjOpab+IWACVJkei+lfFAZh09s=";
+  };
+
+  buildInputs = [ libpng ];
+
+  postPatch = ''
+    ln -s ${agbcc}/tools/agbcc tools/
+  '';
+
+  makeFlags = [
+    "TOOLCHAIN=${gcc-arm-embedded}"
+    "MODERN=${if modern then "1" else "0"}"
+  ];
+
+  enableParallelBuilding = true;
+
+  installPhase = ''
+    runHook preInstall
+    mkdir -p $out
+    cp pokeemerald${lib.optionalString modern "_modern"}.gba $out
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "ROM built from disassembly of Pokémon Emerald";
+    homepage = "https://github.com/pret/pokeemerald";
+    license = licenses.unfree;
+    maintainers = with maintainers; [ sbruder ];
+  };
+}