{
  npins ? import ./npins,
  nixpkgs ? npins.nixpkgs,
  pkgs ? import nixpkgs { },
  lib ? pkgs.lib,
  ...
}:

lib.makeScope pkgs.newScope (
  self:
  let
    addProtobuf = oldAttrs: {
      nativeBuildInputs = oldAttrs.nativeBuildInputs or [ ] ++ [
        (self.callPackage ({ protobuf }: protobuf) { })
      ];
    };
  in
  {
    sidx-crate2nix = (
      self.callPackage ./Cargo.nix {
        defaultCrateOverrides = pkgs.defaultCrateOverrides // {
          sidx = oldAttrs: {
            src =
              let
                fs = pkgs.lib.fileset;
              in
              fs.toSource {
                root = ./.;
                fileset = fs.unions [
                  ./src
                  ./Cargo.toml
                  ./Cargo.lock
                ];
              };
          };
          snix-castore = addProtobuf;
          # prost-wkt-types = addProtobuf;
          # openssl-sys = oldAttrs: {
          #   nativeBuildInputs = oldAttrs.buildInputs or [ ] ++ [
          #     (self.callPackage ({ pkg-config }: pkg-config) { })
          #   ];
          #   buildInputs = oldAttrs.buildInputs or [ ] ++ [
          #     (self.callPackage ({ openssl }: openssl) { })
          #   ];
          # };
        };
      }
    );
    sidx = self.sidx-crate2nix.rootCrate.build;
    datasette-wrapped = self.callPackage (
      {
        datasette,
        datasette-assets,
        makeWrapper,
        runCommand,
      }:
      runCommand "datasettew"
        {
          nativeBuildInputs = [ makeWrapper ];
          preferLocalBuild = true;
          allowSubstitutes = false;
        }
        ''
          mkdir -p "$out/bin"
          makeWrapper ${lib.getExe datasette} "$out/bin/datasettew" \
            --append-flags --metadata=${datasette-assets}/metadata.json \
            --append-flags --static=static:${datasette-assets}/static
        ''
    ) { };
    datasette-assets = self.callPackage (
      {
        runCommand,
        datasette-metadata,
        datasette-settings,
      }:
      runCommand "datasette-assets"
        {
          preferLocalBuild = true;
          allowSubstitutes = false;
        }
        ''
          mkdir "$out"
          cp --no-preserve=mode -r ${./static} "$out"/static
          cp ${datasette-metadata} "$out"/metadata.json
          cp ${datasette-settings} "$out"/settings.json
        ''
    ) { };
    datasette-settings = self.callPackage (
      { formats }:
      (formats.json { }).generate "datasette-settings.json" {
        sql_time_limit_ms = 16000;
      }
    ) { };
    datasette-metadata = self.callPackage (
      { formats }:
      (formats.json { }).generate "datasette-metadata.json" {
        title = "CUDA INDEX";
        description_html = ''
          <p>Visualizing the contents of <a href="https://nixos.org/manual/nixpkgs/unstable/#cuda">Nixpkgs' cudaPackages</a>.
          Generated via an <a href="https://forge.someonex.net/else/sidx">ad-hoc indexing tool</a>.
          </p>
        '';
        "extra_css_urls" = [
          "/static/some.css"
        ];
        "databases" = {
          "sidx" = {
            "tables" = {
              "Hash" = {
                "label_column" = "hash";
              };
              "CudaArtifact" = {
                facets = [
                  "pname"
                  "platform"
                ];
              };
            };
            queries.cuda_conflicts = {
              title = "CudaArtifact Conflicts";
              description_html = ''
                <code>CudaArtifact</code>s (identified by <code>sha256</code>)
                claiming the same <code>(pname, version, platform)</code> triple
              '';
              sql = builtins.readFile ./src/q/summary-cuda-conflicts.sql;
            };
            queries.cuda_pnames = {
              title = "Known CUDA Artifacts";
              description_html = ''
                Overview of known CUDA artifacts sorted by <code>pname</code>
              '';
              sql = builtins.readFile ./src/q/summary-cuda-pnames.sql;
            };
            queries.cuda_platforms = {
              title = "CUDA: Supported Platforms ";
              sql = builtins.readFile ./src/q/summary-cuda-platforms.sql;
            };
          };
        };

      }
    ) { };
  }
)