diff --git a/packages/proton-ge-bin-9/default.nix b/packages/proton-ge-bin-9/default.nix
new file mode 100644
index 0000000..083905f
--- /dev/null
+++ b/packages/proton-ge-bin-9/default.nix
@@ -0,0 +1,81 @@
+{
+  lib,
+  stdenvNoCC,
+  fetchzip,
+  writeScript,
+  # Can be overridden to alter the display name in steam
+  # This could be useful if multiple versions should be installed together
+  steamDisplayName ? "GE-Proton",
+}:
+stdenvNoCC.mkDerivation (finalAttrs: {
+  pname = "proton-ge-bin-9";
+  version = "GE-Proton9-27";
+
+  src = fetchzip {
+    url = "https://github.com/GloriousEggroll/proton-ge-custom/releases/download/${finalAttrs.version}/${finalAttrs.version}.tar.gz";
+    hash = "sha256-70au1dx9co3X+X7xkBCDGf1BxEouuw3zN+7eDyT7i5c=";
+  };
+
+  dontUnpack = true;
+  dontConfigure = true;
+  dontBuild = true;
+
+  outputs = [
+    "out"
+    "steamcompattool"
+  ];
+
+  installPhase = ''
+    runHook preInstall
+
+    # Make it impossible to add to an environment. You should use the appropriate NixOS option.
+    # Also leave some breadcrumbs in the file.
+    echo "${finalAttrs.pname} should not be installed into environments. Please use programs.steam.extraCompatPackages instead." > $out
+
+    mkdir $steamcompattool
+    ln -s $src/* $steamcompattool
+    rm $steamcompattool/compatibilitytool.vdf
+    cp $src/compatibilitytool.vdf $steamcompattool
+
+    runHook postInstall
+  '';
+
+  preFixup = ''
+    substituteInPlace "$steamcompattool/compatibilitytool.vdf" \
+      --replace-fail "${finalAttrs.version}" "${steamDisplayName}"
+  '';
+
+  /*
+    We use the created releases, and not the tags, for the update script as nix-update loads releases.atom
+    that contains both. Sometimes upstream pushes the tags but the Github releases don't get created due to
+    CI errors. Last time this happened was on 8-33, where a tag was created but no releases were created.
+    As of 2024-03-13, there have been no announcements indicating that the CI has been fixed, and thus
+    we avoid nix-update-script and use our own update script instead.
+    See: <https://github.com/NixOS/nixpkgs/pull/294532#issuecomment-1987359650>
+  */
+  passthru.updateScript = writeScript "update-proton-ge" ''
+    #!/usr/bin/env nix-shell
+    #!nix-shell -i bash -p curl jq common-updater-scripts
+    repo="https://api.github.com/repos/GloriousEggroll/proton-ge-custom/releases"
+    version="$(curl -sL "$repo" | jq 'map(select(.prerelease == false)) | .[0].tag_name' --raw-output)"
+    update-source-version proton-ge-bin "$version"
+  '';
+
+  meta = {
+    description = ''
+      Compatibility tool for Steam Play based on Wine and additional components.
+
+      (This is intended for use in the `programs.steam.extraCompatPackages` option only.)
+    '';
+    homepage = "https://github.com/GloriousEggroll/proton-ge-custom";
+    license = lib.licenses.bsd3;
+    maintainers = with lib.maintainers; [
+      NotAShelf
+      Scrumplex
+      shawn8901
+    ];
+    platforms = [ "x86_64-linux" ];
+    sourceProvenance = [ lib.sourceTypes.binaryNativeCode ];
+  };
+})
+