diff --git a/pkgs/by-name/si/sieve/package.nix b/pkgs/by-name/si/sieve/package.nix
new file mode 100644
index 0000000000000..b9b350745d162
--- /dev/null
+++ b/pkgs/by-name/si/sieve/package.nix
@@ -0,0 +1,102 @@
+{
+  lib,
+  buildNpmPackage,
+  fetchFromGitHub,
+  electron,
+  copyDesktopItems,
+  makeDesktopItem,
+  stdenv,
+  xcbuild,
+}:
+
+buildNpmPackage {
+  pname = "sieve";
+  version = "0.6.1-unstable-2025-01-06";
+
+  src = fetchFromGitHub {
+    owner = "thsmi";
+    repo = "sieve";
+    rev = "a9f2e682fd972bd0e12bde3dac7d2a1516f66456";
+    hash = "sha256-PL17gh+nS90Y9Rli7XCoHOjl0NJOxko79ouYzLeou6Y=";
+  };
+
+  npmDepsHash = "sha256-66VnbYe6j7i6sxKQ/RHzGlFoNLig9yBTXby6meN0nOE=";
+
+  ELECTRON_SKIP_BINARY_DOWNLOAD = "1";
+
+  npmBuildScript = "gulp";
+  npmBuildFlags = "app:package";
+
+  nativeBuildInputs =
+    lib.optionals stdenv.hostPlatform.isLinux [ copyDesktopItems ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ xcbuild ];
+
+  installPhase = ''
+    runHook preInstall
+
+    build_dir=build/electron/resources
+
+    ${lib.optionalString stdenv.hostPlatform.isLinux ''
+      mkdir -p $out/{share,bin}
+      cp -r $build_dir $out/share/sieve
+
+      # copy icon
+      install -D $build_dir/libs/icons/linux.png $out/share/icons/hicolor/64x64/apps/sieve.png
+
+      makeWrapper '${lib.getExe electron}' $out/bin/sieve \
+        --add-flags "\''${NIXOS_OZONE_WL:+\''${WAYLAND_DISPLAY:+--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations --enable-wayland-ime}}" \
+        --add-flags $out/share/sieve
+    ''}
+
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
+      app_dir=$out/Applications/Sieve.app
+
+      # copy electron
+      mkdir -p $out/Applications
+      cp -r ${electron}/Applications/Electron.app $app_dir
+      chmod -R +w $app_dir
+      mv $app_dir/Contents/MacOS/{Electron,Sieve}
+
+      # copy built app
+      cp -r $build_dir $app_dir/Contents/Resources/app
+      cp $app_dir/Contents/Resources/{app/libs/icons/mac.icns,sieve.icns}
+
+      # rebranding
+      info_plist="$app_dir/Contents/Info.plist"
+      plutil -replace CFBundleDisplayName -string Sieve "$info_plist"
+      plutil -replace CFBundleIdentifier -string net.tschmid.sieve "$info_plist"
+      plutil -replace CFBundleName -string Sieve "$info_plist"
+      plutil -replace CFBundleExecutable -string Sieve "$info_plist"
+      plutil -replace CFBundleIconFile -string sieve.icns "$info_plist"
+
+      # add wrapper for main executable
+      mkdir -p $out/bin
+      makeWrapper $app_dir/Contents/MacOS/Sieve $out/bin/sieve
+    ''}
+
+    runHook postInstall
+  '';
+
+  desktopItems = lib.optionals stdenv.hostPlatform.isLinux [
+    (makeDesktopItem {
+      name = "sieve";
+      exec = "sieve";
+      desktopName = "Sieve";
+      icon = "sieve";
+      comment = "Sieve script editor";
+      categories = [
+        "Network"
+        "Email"
+      ];
+    })
+  ];
+
+  meta = {
+    description = "Sieve script editor";
+    homepage = "https://github.com/thsmi/sieve";
+    license = lib.licenses.agpl3Only;
+    mainProgram = "sieve";
+    maintainers = with lib.maintainers; [ fugi ];
+    inherit (electron.meta) platforms;
+  };
+}