init vanta-agent

https://github.com/NixOS/nixpkgs/pull/335132

pkgs/vanta-agent.nix

@@ -0,0 +1,45 @@
+{
+  lib,
+  stdenv,
+  fetchurl,
+  dpkg,
+}:
+let
+  version = "2.9.0";
+in
+stdenv.mkDerivation {
+  pname = "vanta-agent";
+  inherit version;
+  src = fetchurl {
+    url = "https://vanta-agent-repo.s3.amazonaws.com/targets/versions/${version}/vanta-amd64.deb";
+    hash = "sha256-oTiILQNXcO3rPmXdLhueQw+h2psqMUcw+UmXaU70UYs=";
+  };
+
+  nativeBuildInputs = [ dpkg ];
+
+  unpackPhase = ''
+    runHook preUnpack
+
+    dpkg-deb -x $src .
+
+    runHook postUnpack
+  '';
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out
+    cp -r usr $out/
+    cp -r var $out/
+
+    runHook postInstall
+  '';
+
+  meta = {
+    description = "Vanta Agent";
+    homepage = "https://vanta.com";
+    maintainers = with lib.maintainers; [ matdibu ];
+    platforms = [ "x86_64-linux" ];
+    sourceProvenance = [ lib.sourceTypes.binaryNativeCode ];
+  };
+}