{ inputs, ... }:{  perSystem =    { pkgs, ... }:    let      # NOTE: Duplicated because this is in a separate flake-parts partition      # than ./packages.nix      mkZed = import ../toolchain.nix { inherit inputs; };      zed-editor = mkZed pkgs;       rustBin = inputs.rust-overlay.lib.mkRustBin { } pkgs;      rustToolchain = rustBin.fromRustupToolchainFile ../../rust-toolchain.toml;       baseEnv =        (zed-editor.overrideAttrs (attrs: {          passthru.env = attrs.env;        })).env; # exfil `env`; it's not in drvAttrs       # Musl cross-compiler for building remote_server      muslCross = pkgs.pkgsCross.musl64;       # Cargo build timings wrapper script      wrappedCargo = pkgs.writeShellApplication {        name = "cargo";        runtimeInputs = [ pkgs.nodejs ];        text =          let            pathToCargoScript = ./. + "/../../script/cargo";          in          ''            NIX_WRAPPER=1 CARGO=${rustToolchain}/bin/cargo ${pathToCargoScript} "$@"          '';      };    in    {      devShells.default = (pkgs.mkShell.override { inherit (zed-editor) stdenv; }) {        name = "zed-editor-dev";        inputsFrom = [ zed-editor ];         packages = with pkgs; [          wrappedCargo # must be first, to shadow the `cargo` provided by `rustToolchain`          rustToolchain # cargo, rustc, and rust-toolchain.toml components included          cargo-nextest          cargo-hakari          cargo-machete          cargo-zigbuild          # TODO: package protobuf-language-server for editing zed.proto          # TODO: add other tools used in our scripts           # `build.nix` adds this to the `zed-editor` wrapper (see `postFixup`)          # we'll just put it on `$PATH`:          nodejs_22          zig                    # A11y testing script `script/a11y-inspector`          gobject-introspection # shell hook that populates GI_TYPELIB_PATH          at-spi2-core          # provides Atspi-2.0.typelib and DBus-1.0.typelib          (python3.withPackages (ps: [ps.pyatspi ps.pygobject3]))          accerciser        ];         env =          (removeAttrs baseEnv [            "LK_CUSTOM_WEBRTC" # download the staticlib during the build as usual            "ZED_UPDATE_EXPLANATION" # allow auto-updates            "CARGO_PROFILE" # let you specify the profile            "TARGET_DIR"          ])          // {            # note: different than `$FONTCONFIG_FILE` in `build.nix` – this refers to relative paths            # outside the nix store instead of to `$src`            FONTCONFIG_FILE = pkgs.makeFontsConf {              fontDirectories = [                "./assets/fonts/lilex"                "./assets/fonts/ibm-plex-sans"              ];            };            PROTOC = "${pkgs.protobuf}/bin/protoc";            ZED_ZSTD_MUSL_LIB = "${pkgs.pkgsCross.musl64.pkgsStatic.zstd.out}/lib";            # For aws-lc-sys musl cross-compilation            CC_x86_64_unknown_linux_musl = "${muslCross.stdenv.cc}/bin/x86_64-unknown-linux-musl-gcc";          };      };    };}