add Commander X16

pkgs/commander-x16/cc65.nix

@@ -0,0 +1,20 @@
+{ stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  name = "cc65";
+
+  src = fetchFromGitHub {
+    owner = name;
+    repo = name;
+    rev = "b525554bfee3c3ddc5ddd7e58b4a20728f6c9cb1";
+    sha256 = "0san7n092bx823pliypvvsbhhzq9q39n1qqivjcyc2xab2dwir84";
+  };
+
+  buildPhase = ''
+    make PREFIX="$out"
+  '';
+
+  installPhase = ''
+    make install PREFIX="$out"
+  '';
+}

pkgs/commander-x16/default.nix

@@ -0,0 +1,9 @@
+{ callPackage, symlinkJoin }:
+
+symlinkJoin {
+  name = "commander-x16-tools";
+  paths = [
+    (callPackage ./cc65.nix { })
+    (callPackage ./emulator.nix { })
+  ];
+}

pkgs/commander-x16/emulator.nix

@@ -0,0 +1,45 @@
+{ stdenv, callPackage, fetchFromGitHub, SDL2 }:
+let
+  rev = "r38";
+  owner = "commanderx16";
+  cc65 = callPackage ./cc65.nix { };
+
+  x16rom = stdenv.mkDerivation rec {
+    name = "x16-rom";
+
+    src = fetchFromGitHub {
+      inherit owner rev;
+      repo = name;
+      sha256 = "10m6v0xpjkbrnjspsn7z0r22wphbvcrxw8f59z98xv21kb98ban5";
+    };
+
+    buildInputs = [ cc65 ];
+
+    preBuild = ''
+      patchShebangs scripts
+    '';
+
+    installPhase = ''
+      cp ./build/x16/rom.bin "$out"
+    '';
+  };
+
+in
+stdenv.mkDerivation rec {
+  name = "x16-emulator";
+
+  src = fetchFromGitHub {
+    inherit owner rev;
+    repo = name;
+    sha256 = "10cidc825bz3bniwascn472a9a8087f9lfl9b20r6dkvdzz6mm2q";
+  };
+
+  buildInputs = [ SDL2.dev ];
+
+  installPhase = ''
+    mkdir -p "$out/bin"
+    cp x16emu "$out/"
+    ln -s "${x16rom}" "$out/rom.bin"
+    ln -s "$out/x16emu" "$out/bin/x16emu"
+  '';
+}