nexusd: init at 3.3.0

Add [nexusd](https://github.com/gammazero/nexus),
a WAMP v2 router written in Go.
While the upstream repo also offers a (client) library,
this package is scoped to just the router daemon.

Signed-off-by: cinereal <cinereal@riseup.net>

pkgs/by-name/ne/nexusd/package.nix

@@ -0,0 +1,30 @@
+{
+  lib,
+  buildGoModule,
+  fetchFromGitHub,
+}:
+buildGoModule (finalAttrs: {
+  pname = "nexusd";
+  version = "3.3.0";
+  __structuredAttrs = true;
+
+  src = fetchFromGitHub {
+    owner = "gammazero";
+    repo = "nexus";
+    rev = "v${finalAttrs.version}";
+    sha256 = "sha256-c9y1NplODCIz+IZlZAyzm3G75D1wawTwbB6SZXZqjXc=";
+  };
+
+  vendorHash = "sha256-1sZDoDcX/9upTZ8bL7l+ldsouBZVT+61RFSRaeB6Dm8=";
+
+  subPackages = [ "nexusd" ];
+
+  meta = {
+    description = "Full-feature WAMP v2 router written in Go";
+    homepage = "https://github.com/gammazero/nexus";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ kiara ];
+    mainProgram = "nexusd";
+    platforms = lib.platforms.unix;
+  };
+})