softethe v5 (dev) building perfectly fine with nix and cmake

.gitignore

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+/result

flake.lock

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+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1751984180,
+        "narHash": "sha256-LwWRsENAZJKUdD3SpLluwDmdXY9F45ZEgCb0X+xgOL0=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "9807714d6944a957c2e036f84b0ff8caf9930bc0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  description = "softether-5";
+
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+
+  outputs = { self, nixpkgs }:
+  let
+    system = "x86_64-linux";
+    pkgs = nixpkgs.legacyPackages.${system};
+    pname = "softether-5";
+    version = "5.02.5187";
+  in {
+    packages.${system}.default = pkgs.callPackage ./package.nix { inherit pname version; };
+  };
+}

package.nix

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+{
+  pkgs,
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  pname ? "softether",
+  logDir ? "/var/log/${pname}",
+  pidDir ? "/run/${pname}",
+  dbDir ? "/var/lib/${pname}",
+  dataDir ? "/var/lib/${pname}",
+  version ? "master",
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  inherit pname version;
+
+  src = fetchFromGitHub {
+    owner = "SoftEtherVPN";
+    repo = "SoftEtherVPN";
+    tag = "${finalAttrs.version}";
+    hash = "sha256-KGcQNsHwEtJ0CR35XcW89UPqnnLlGus/zAGBZDgz5uo=";
+    fetchSubmodules = true;
+  };
+
+  nativeBuildInputs = with pkgs; [
+    cmake
+    pkg-config
+    libsodium
+    # Add other build tools here
+  ];
+
+  buildInputs = with pkgs; [
+    openssl
+    readline
+    ncurses
+    zlib
+    bash
+  ];
+
+  cmakeFlags = [
+    "-DSE_PIDDIR=${pidDir}" "-DSE_LOGDIR=${logDir}" "-DSE_DBDIR=${dbDir}" "-DCMAKE_INSTALL_SYSTEMD_UNITDIR="
+    "-DCMAKE_BUILD_TYPE=Debug"
+    "-DCMAKE_INSTALL_PREFIX=${placeholder "out"}"
+    "-DCMAKE_INSTALL_LIBDIR=lib"
+    "-DCMAKE_INSTALL_INCLUDEDIR=include"
+    "-DCMAKE_INSTALL_LIBEXECDIR=libexec"
+  ];
+
+  meta = {
+    description = "Open-Source Free Cross-platform Multi-protocol VPN Program";
+    homepage = "https://www.softether.org/";
+    license = lib.licenses.asl20;
+    maintainers = [ lib.maintainers.rick68 ];
+    platforms = [
+      "x86_64-linux"
+      "aarch64-linux"
+    ];
+  };
+})