diff --git a/pkgs/lad/default.nix b/pkgs/lad/default.nix
new file mode 100644
index 0000000..690cfa9
--- /dev/null
+++ b/pkgs/lad/default.nix
@@ -0,0 +1,49 @@
+{ lua5_2
+, lua5_1
+, stdenv
+, makeWrapper
+, fetchFromGitHub
+, lib
+, wantLad5_1 ? true
+, wantLad5_2 ? true
+}:
+
+let
+  our-lua52 = lua5_2.withPackages (ps: with ps; [
+    lpeg
+  ]);
+  our-lua51 = lua5_1.withPackages (ps: with ps; [
+    lpeg
+  ]);
+in stdenv.mkDerivation {
+  pname = "lad";
+  version = "5d2eafb";
+  nativeBuildInputs = [
+    makeWrapper
+  ];
+  src = fetchFromGitHub {
+    owner = "andremm";
+    repo = "lad";
+    rev = "5d2eafb8790d7a1030aca0dbb75201073aacd1d9";
+    hash = "sha256-oIKayAUuRDqiHmAD37A5RYcMTh1RtpNl0jLcc5h3718=";
+  };
+  LUA51 = lib.getExe our-lua51;
+  LUA52 = lib.getExe our-lua52;
+  installPhase = ''
+    mkdir -p $out/bin $out/opt/{5.1,5.2}
+    cp 5.1/*.lua $out/opt/5.1/
+    cp 5.2/*.lua $out/opt/5.2/
+    ${lib.optionalString wantLad5_1 ''
+    makeWrapper $LUA51 $out/bin/luaa-5.1 \
+      --add-flags $out/opt/5.1/assembler.lua
+    makeWrapper $LUA51 $out/bin/luad-5.1 \
+      --add-flags $out/opt/5.1/disassembler.lua
+    ''}
+    ${lib.optionalString wantLad5_2 ''
+    makeWrapper $LUA52 $out/bin/luaa-5.2 \
+      --add-flags $out/opt/5.2/luaa.lua
+    makeWrapper $LUA52 $out/bin/luad-5.2 \
+      --add-flags $out/opt/5.2/luad.lua
+    ''}
+  '';
+}