Change:
}; }; in <del> unwrapped </del> <ins> { inherit pname version src sourceRoot dontFixup; passthru = { inherit executableName longName tests updateScript; fhs = fhs { }; fhsWithPackages = f: fhs { additionalPkgs = f; }; } // lib.optionalAttrs (vscodeServer != null) { inherit rev vscodeServer; }; desktopItem = makeDesktopItem { name = executableName; desktopName = longName; comment = "Code Editing. Redefined."; genericName = "Text Editor"; exec = "${executableName} %F"; icon = "vs${executableName}"; startupNotify = true; startupWMClass = shortName; categories = [ "Utility" "TextEditor" "Development" "IDE" ]; mimeTypes = [ "text/plain" "inode/directory" ]; keywords = [ "vscode" ]; actions.new-empty-window = { name = "New Empty Window"; exec = "${executableName} --new-window %F"; icon = "vs${executableName}"; }; }; urlHandlerDesktopItem = makeDesktopItem { name = executableName + "-url-handler"; desktopName = longName + " - URL Handler"; comment = "Code Editing. Redefined."; genericName = "Text Editor"; exec = executableName + " --open-url %U"; icon = "vs${executableName}"; startupNotify = true; categories = [ "Utility" "TextEditor" "Development" "IDE" ]; mimeTypes = [ "x-scheme-handler/vscode" ]; keywords = [ "vscode" ]; noDisplay = true; }; buildInputs = [ libsecret libXScrnSaver libxshmfence ] ++ lib.optionals (!stdenv.isDarwin) [ alsa-lib at-spi2-atk libkrb5 mesa nss nspr systemd xorg.libxkbfile ]; runtimeDependencies = lib.optionals stdenv.isLinux [ (lib.getLib systemd) fontconfig.lib libdbusmenu wayland libsecret ]; nativeBuildInputs = [ unzip ] ++ lib.optionals stdenv.isLinux [ autoPatchelfHook asar # override doesn't preserve splicing https://github.com/NixOS/nixpkgs/issues/132651 (buildPackages.wrapGAppsHook.override { inherit (buildPackages) makeWrapper; }) ]; dontBuild = true; dontConfigure = true; noDumpEnvVars = true; installPhase = '' runHook preInstall '' + (if stdenv.isDarwin then '' mkdir -p "$out/Applications/${longName}.app" "$out/bin" cp -r ./* "$out/Applications/${longName}.app" ln -s "$out/Applications/${longName}.app/Contents/Resources/app/bin/${sourceExecutableName}" "$out/bin/${executableName}" '' else '' mkdir -p "$out/lib/vscode" "$out/bin" cp -r ./* "$out/lib/vscode" ln -s "$out/lib/vscode/bin/${sourceExecutableName}" "$out/bin/${executableName}" mkdir -p "$out/share/applications" ln -s "$desktopItem/share/applications/${executableName}.desktop" "$out/share/applications/${executableName}.desktop" ln -s "$urlHandlerDesktopItem/share/applications/${executableName}-url-handler.desktop" "$out/share/applications/${executableName}-url-handler.desktop" # These are named vscode.png, vscode-insiders.png, etc to match the name in upstream *.deb packages. mkdir -p "$out/share/pixmaps" cp "$out/lib/vscode/resources/app/resources/linux/code.png" "$out/share/pixmaps/vs${executableName}.png" # Override the previously determined VSCODE_PATH with the one we know to be correct sed -i "/ELECTRON=/iVSCODE_PATH='$out/lib/vscode'" "$out/bin/${executableName}" grep -q "VSCODE_PATH='$out/lib/vscode'" "$out/bin/${executableName}" # check if sed succeeded # Remove native encryption code, as it derives the key from the executable path which does not work for us. # The credentials should be stored in a secure keychain already, so the benefit of this is questionable # in the first place. rm -rf $out/lib/vscode/resources/app/node_modules/vscode-encrypt '') + '' runHook postInstall ''; preFixup = '' gappsWrapperArgs+=( # Add gio to PATH so that moving files to the trash works when not using a desktop environment --prefix PATH : ${glib.bin}/bin --add-flags "''${NIXOS_OZONE_WL:+''${WAYLAND_DISPLAY:+--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations}}" --add-flags ${lib.escapeShellArg commandLineArgs} ) ''; # See https://github.com/NixOS/nixpkgs/issues/49643#issuecomment-873853897 # linux only because of https://github.com/NixOS/nixpkgs/issues/138729 postPatch = lib.optionalString stdenv.isLinux '' # this is a fix for "save as root" functionality packed="resources/app/node_modules.asar" unpacked="resources/app/node_modules" asar extract "$packed" "$unpacked" substituteInPlace $unpacked/@vscode/sudo-prompt/index.js  --replace "/usr/bin/pkexec" "/run/wrappers/bin/pkexec"  --replace "/bin/bash" "${bash}/bin/bash" rm -rf "$packed" # without this symlink loading JsChardet, the library that is used for auto encoding detection when files.autoGuessEncoding is true, # fails to load with: electron/js2c/renderer_init: Error: Cannot find module 'jschardet' # and the window immediately closes which renders VSCode unusable # see https://github.com/NixOS/nixpkgs/issues/152939 for full log ln -rs "$unpacked" "$packed" '' + ( let vscodeRipgrep = if stdenv.isDarwin then "Contents/Resources/app/node_modules.asar.unpacked/@vscode/ripgrep/bin/rg" else "resources/app/node_modules/@vscode/ripgrep/bin/rg"; in if !useVSCodeRipgrep then '' rm ${vscodeRipgrep} ln -s ${ripgrep}/bin/rg ${vscodeRipgrep} '' else '' chmod +x ${vscodeRipgrep} '' ); postFixup = lib.optionalString stdenv.isLinux '' patchelf --add-needed ${libglvnd}/lib/libGLESv2.so.2 $out/lib/vscode/${executableName} ''; inherit meta; }) </ins>

Discussion:
I want to install vscode-insider with fhs support and I have this in my home-manager config: but when I run , it outputs: It seems that my override attr is ignored. Remove the , it work correctly.