First package ?

modules/NoRiskClient/default.nix

@@ -0,0 +1,22 @@
+{ stdenv, lib, buildGoModule, fetchFromGitHub }:
+
+buildGoModule rec { pname = "noriskclient-launcher"; version = "0.5.6";
+
+  src = fetchFromGitHub {
+    owner = "NoRiskClient";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-qyFuspRcBNyf8eBPlNc9hHMSrJ7G1vQwI0CJP9eFQKY=";
+  };
+
+  vendorHash = null;
+
+  doCheck = false;
+
+  meta = with lib; {
+    description = "No Risk Client";
+    homepage = "https://github.com/github-owner/${pname}";
+    license = licenses.gpl3;
+    platforms = platforms.unix;
+  };
+}

modules/NoRiskClient/result

@@ -0,0 +1 @@
+/nix/store/sblh9mq6dwkd69h8hg4a8m0hvqc4hpx5-noriskclient-launcher-0.5.6

modules/packages/default.nix

@@ -1,8 +1,13 @@
 { pkgs, ... }:
 
 {
+  nixpkgs.config.packageOverrides = pkgs: {
+    noriskclient-launcher = pkgs.callPackage  ./../NoRiskClient/default.nix { };
+  };
+
   environment.systemPackages = with pkgs; [
   #hackerman
+  noriskclient-launcher   
   fastfetch
   cmatrix
   cava