{ depotdownloader, callPackage, fetchNuGet, ed }:
depotdownloader.overrideAttrs (
{ patches ? []
, buildInputs
, nativeBuildInputs ? []
, passthru ? {}
, version
, ...
}:
let
  # see 2.7.3 below
  "SteamKit2" = callPackage (
    { lib, buildDotnetModule
    , fetchFromGitHub, fetchNuGet
    , dotnetCorePackages
    , ed }:
    buildDotnetModule rec {
      pname = "SteamKit2";
      version = "3.0.0-Beta.4";
      src = fetchFromGitHub {
        owner = "SteamRE";
        repo = "SteamKit";
        rev = version;
        hash = "sha256-m4ppH3pTCeqs0PrUTVDErqq94CK0XCTWIvTLy1Ll2Cs=";
      };

      projectFile = "SteamKit2/SteamKit2.sln";

      nugetDeps = buildInputs;
      nativeBuildInputs = [ ed ];
      dotnet-sdk = dotnetCorePackages.sdk_8_0;
      dotnet-runtime = dotnetCorePackages.runtime_8_0;

      patches = [ ./2_7/0001-NO-NO-AND-NO.patch ];
      postPatch = ''
        # nuclear option because tests pull in extra deps
        rm -rf SteamKit2/Tests
        ed ${projectFile} <<EOF
        /Tests/;/EndProject/d
        w
        EOF
      '';

      packNupkg = true;
    }
  ) {};
  replacePkgInList = n: v: l: let
    toAttrs = builtins.listToAttrs
      (map (p: { name = p.pname; value = p; }) l);
  in builtins.attrValues (toAttrs // {
    ${n} = v;
  });
  replaceSK2 = replacePkgInList "SteamKit2" SteamKit2;
in
if builtins.elem version [ "2.4.7" "2.5.0" ] then
  {
    patches = [
      # with this, nix has access to the hashes in the manifest
      ./2_5/0001-emit-json-in-.DepotDownload.patch
      # the manifest can arrive out of order across requests to the same build!
      # luckily that singular reproducibility snag is patched in 1 line.
      ./2_5/0002-ProtoManifest-sort-files-in-constructor.patch
    ];
  }
# the underlying version of steamkit2 here is kinda busted for nix purposes
# so we have to get up to some crimes against humanity
else if builtins.elem version [ "2.7.3" ] then
  {
    patches = [
      ./2_7/0001-ProtoManifest-sort-files-in-constructor.patch
      ./2_7/0002-emit-json-in-.DepotDownload.patch
      # formatting very the epic
      ./2_7/0003-thats-just-like-your-opinion-man.patch
    ];
    nugetDeps = replaceSK2 passthru.nugetDeps;
    buildInputs = replaceSK2 buildInputs;
    nativeBuildInputs = nativeBuildInputs ++ [ ed ];
    postPatch = ''
      ed DepotDownloader/DepotDownloader.csproj <<EOF
      /SteamKit2/s/-[Bb]eta.[0-9]*//
      w
      EOF
    '';
  }
else builtins.abort "version of DepotDownloader not covered by patches"
)