Add overlay for ds3os

Signed-off-by: Magic_RB <magic_rb@redalder.org>

flake.nix

@@ -59,6 +59,7 @@
         overlays/getmail6
         overlays/maildrop
         overlays/courier-unicode.nix
+        overlays/ds3os.nix
       ];
 
       flake.nixosModules = {

overlays/ds3os.nix

@@ -0,0 +1,34 @@
+{ ... }:
+let
+  pname = "ds3os";
+  version = "0.22.0.0";
+in
+{
+  flake.overlays.ds3os =
+    final: prev:
+    {
+      ds3os =
+        prev.gcc11Stdenv.mkDerivation {
+          inherit pname version;
+
+          src = prev.fetchFromGitHub {
+            owner = "TLeonardUK";
+            repo = pname;
+            rev = "v${version}-main";
+            sha256 = "sha256-Rsiyo2tuOsjyl1OtXKbzRlD6d3divJJAdlijXt/RxmA=";
+          };
+
+          hardeningDisable = [ "format" ];
+
+          nativeBuildInputs = with prev; [ cmake ];
+
+          installPhase = ''
+            mkdir -p $out/{bin,libexec}
+            cp -r ../bin/x64_release $out/libexec/.
+            ln -s $out/libexec/Server $out/bin/ds3os
+          '';
+
+          meta.broken = true;
+        };
+    };
+}