{  lib,  mkShell,  stdenv,  stdenvAdapters,  makeFontsConf,   zed-editor,   rust-analyzer,  cargo-nextest,  nixfmt-rfc-style,  protobuf,  nodejs_22,}:let  moldStdenv = stdenvAdapters.useMoldLinker stdenv;  mkShell' =    if stdenv.hostPlatform.isLinux then mkShell.override { stdenv = moldStdenv; } else mkShell;inmkShell' {  inputsFrom = [ zed-editor ];  packages = [    rust-analyzer    cargo-nextest    nixfmt-rfc-style    # 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 `$PATH`:    nodejs_22  ];   # We set SDKROOT and DEVELOPER_DIR to the Xcode ones instead of the nixpkgs ones, because  # we need Swift 6.0 and nixpkgs doesn't have it  shellHook = lib.optionalString stdenv.hostPlatform.isDarwin ''    export SDKROOT="/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk";    export DEVELOPER_DIR="/Applications/Xcode.app/Contents/Developer";  '';   env =    let      baseEnvs =        (zed-editor.overrideAttrs (attrs: {          passthru = { inherit (attrs) env; };        })).env; # exfil `env`; it's not in drvAttrs    in    (removeAttrs baseEnvs [      "LK_CUSTOM_WEBRTC" # download the staticlib during the build as usual      "ZED_UPDATE_EXPLANATION" # allow auto-updates      "CARGO_PROFILE" # let you specify the profile      "TARGET_DIR"    ])    // {      # note: different than `$FONTCONFIG_FILE` in `build.nix` – this refers to relative paths      # outside the nix store instead of to `$src`      FONTCONFIG_FILE = makeFontsConf {        fontDirectories = [          "./assets/fonts/plex-mono"          "./assets/fonts/plex-sans"        ];      };      PROTOC = "${protobuf}/bin/protoc";    };}