Change:
<ins> { lib, stdenv, mkYarnPackage, fetchFromGitHub, applyPatches, fetchYarnDeps, makeDesktopItem, copyDesktopItems, wrapGAppsHook, electron, }: mkYarnPackage rec { pname = "koodo-reader"; version = "1.6.6"; src = applyPatches { src = fetchFromGitHub { owner = "troyeguo"; repo = "koodo-reader"; rev = "v${version}"; hash = "sha256-g2bVm8LFeEIPaWlaxzMI0SrpM+79zQFzJ7Vs5CbWBT4="; }; patches = [ ./update-react-i18next.patch ]; # Could be upstreamed }; # should be copied from `koodo-reader.src` packageJSON = ./package.json; patches = [ ./fix-isdev.patch ]; offlineCache = fetchYarnDeps { yarnLock = "${src}/yarn.lock"; hash = "sha256-VvYkotVb74zR9+/IWiQwOX/6RJf+xukpi7okRovfVzc="; }; nativeBuildInputs = [ copyDesktopItems wrapGAppsHook ]; dontWrapGApps = true; env.ELECTRON_SKIP_BINARY_DOWNLOAD = "1"; configurePhase = '' runHook preConfigure cp -r $node_modules node_modules chmod +w node_modules runHook postConfigure ''; buildPhase = '' runHook preBuild export HOME=$(mktemp -d) yarn --offline build yarn --offline run electron-builder --dir  -c.electronDist=${electron}/libexec/electron  -c.electronVersion=${electron.version} runHook postBuild ''; installPhase = '' runHook preInstall install -Dm644 assets/icons/256x256.png $out/share/icons/hicolor/256x256/apps/koodo-reader.png install -Dm644 ${./mime-types.xml} $out/share/mime/packages/koodo-reader.xml mkdir -p $out/share/lib/koodo-reader cp -r dist/*-unpacked/{locales,resources{,.pak}} $out/share/lib/koodo-reader runHook postInstall ''; postFixup = '' makeWrapper ${electron}/bin/electron $out/bin/koodo-reader  --add-flags $out/share/lib/koodo-reader/resources/app.asar  "''${gappsWrapperArgs[@]}"  --add-flags "''${NIXOS_OZONE_WL:+''${WAYLAND_DISPLAY:+--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations}}"  --inherit-argv0 ''; doDist = false; desktopItems = [ (makeDesktopItem { name = "koodo-reader"; desktopName = "Koodo Reader"; exec = "koodo-reader %U"; icon = "koodo-reader"; comment = meta.description; categories = [ "Office" ]; mimeTypes = [ "application/epub+zip" "application/pdf" "image/vnd.djvu" "application/x-mobipocket-ebook" "application/vnd.amazon.ebook" "application/vnd.amazon.ebook" "application/x-cbz" "application/x-cbr" "application/x-cbt" "application/x-cb7" "application/x-fictionbook+xml" ]; startupWMClass = "Koodo Reader"; terminal = false; }) ]; meta = { broken = stdenv.isDarwin; changelog = "https://github.com/troyeguo/koodo-reader/releases/tag/v${version}"; description = "A cross-platform ebook reader"; longDescription = '' A modern ebook manager and reader with sync and backup capacities for Windows, macOS, Linux and Web ''; homepage = "https://github.com/troyeguo/koodo-reader"; license = lib.licenses.agpl3Only; mainProgram = "koodo-reader"; maintainers = with lib.maintainers; [ tomasajt ]; platforms = electron.meta.platforms; }; } </ins>

Discussion:
Project description Koodo Reader is an all-in-one ebook reader that can help you better manage and study your ebooks. It's free and open-source. Features Format support: EPUB (.epub) Scanned document (.pdf, .djvu) DRM-free Mobipocket (.mobi) and Kindle (.azw3, .azw) Plain text (.txt) FictionBook (.fb2) Comic book archive (.cbr, .cbz, .cbt, .cb7) Rich text (.md, .docx) Hyper Text (.html, .xml, .xhtml, .mhtml, .htm, .htm) Platform support: Windows, macOS, Linux and Web Save your data to Dropbox or Webdav Customize the source folder and synchronize among multiple devices using OneDrive, iCloud, Dropbox, etc. Single-column, two-column, or continuous scrolling layouts Text-to-speech, translation, progress slider, touch screen support, batch import Add bookmarks, notes, highlights to your books Adjust font size, font family, line-spacing, paragraph spacing, background color, text color, margins, and brightness Night mode and theme color Text highlight, underline, boldness, italics and shadow Metadata homepage URL: source URL: license: AGPL-v3.0 platforms: Windows, macOS, Linux and Web