diff --git a/pkgs/by-name/au/autenticacao-gov-pt-bin/package.nix b/pkgs/by-name/au/autenticacao-gov-pt-bin/package.nix
new file mode 100644
index 000000000000..e3b1a1a0ca13
--- /dev/null
+++ b/pkgs/by-name/au/autenticacao-gov-pt-bin/package.nix
@@ -0,0 +1,169 @@
+{
+  autoPatchelfHook,
+  ccid,
+  cjson,
+  copyDesktopItems,
+  curl,
+  doxygen,
+  fetchurl,
+  flatpak,
+  lib,
+  libGL,
+  libgcc,
+  libsForQt5,
+  libzip,
+  makeDesktopItem,
+  makeWrapper,
+  openjpeg,
+  openpace,
+  openssl,
+  ostree,
+  patchelf,
+  pcsclite,
+  pkg-config,
+  proot,
+  qt5,
+  stdenv,
+  xml-security-c,
+}:
+
+let
+  xercesc_3_2 = stdenv.mkDerivation rec {
+    pname = "xerces-c";
+    version = "3.2.3";
+
+    src = fetchurl {
+      url = "mirror://apache/xerces/c/3/sources/xerces-c-${version}.tar.gz";
+      hash = "sha256-+5b8SbH7iS0eZOU6atqKzPbw5tMM4JN5Vuxo05vXLH4=";
+    };
+
+    nativeBuildInputs = [ pkg-config ];
+    configureFlags = [ "--disable-static" ];
+
+    meta = {
+      description = "Validating XML parser written in a portable subset of C++";
+      homepage = "https://xerces.apache.org/xerces-c/";
+      license = lib.licenses.asl20;
+      platforms = lib.platforms.unix;
+    };
+  };
+
+in
+stdenv.mkDerivation rec {
+  pname = "autenticacao-gov-pt-bin";
+  version = "3.13.3";
+
+  src = fetchurl {
+    url = "https://github.com/amagovpt/autenticacao.gov/releases/download/v${version}/pteid-mw-${version}.flatpak";
+    hash = "sha256-kUSUcX3/rPENdyd6ABeqADqK4CcSltwsdnmcgWzw8Fc=";
+  };
+
+  dontConfigure = true;
+  dontBuild = true;
+
+  nativeBuildInputs = [
+    autoPatchelfHook
+    copyDesktopItems
+    flatpak
+    makeWrapper
+    ostree
+    patchelf
+    qt5.wrapQtAppsHook
+  ];
+
+  buildInputs = [
+    ccid
+    cjson
+    curl
+    doxygen
+    libGL
+    libgcc
+    libsForQt5.poppler
+    libzip
+    openjpeg
+    openpace
+    openssl
+    pcsclite
+    proot
+    qt5.qtbase
+    qt5.qtgraphicaleffects
+    qt5.qtquickcontrols
+    qt5.qtquickcontrols2
+    qt5.qttools
+    xercesc_3_2
+    xml-security-c
+  ];
+
+  unpackPhase = ''
+    ostree init --repo=pteid --mode=archive-z2
+    ostree static-delta apply-offline --repo=pteid ${src}
+    ostree checkout --repo=pteid -U $(cd pteid/objects && echo */*.commit | sed -E "s/\/|\.commit$//g") pteid_out
+  '';
+
+  desktopItems = [
+    (makeDesktopItem {
+      name = pname;
+      exec = pname;
+      desktopName = "Autenticação.gov";
+      genericName = "Portuguese eID Data";
+      comment = "Middleware for Electronic Identification in Portugal";
+      icon = "pt.gov.autenticacao";
+      terminal = false;
+      startupNotify = true;
+      categories = [ "Office" ];
+    })
+  ];
+
+  preInstall = ''
+    mkdir -p $out/share $out/app/{lib,share}
+    cp -r pteid_out/files/bin $out/app
+    cp -r pteid_out/files/lib/lib{pteid,CMD}* $out/app/lib/
+    cp -r pteid_out/files/share/certs $out/app/share
+    cp -r pteid_out/files/share/icons $out/share
+  '';
+
+  postInstall = ''
+    makeWrapper "${proot}/bin/proot" "$out/bin/${pname}" \
+      --add-flags "-b" \
+      --add-flags "$out/app:/app" \
+      --add-flags "$out/app/bin/eidguiV2" \
+      --argv0 "$out/bin/eidguiV2"
+  '';
+
+  preFixup = ''
+    find $out/app/lib -type f -name '*.so*' | while read lib; do
+      patchelf --replace-needed libxml-security-c.so.20 libxml-security-c.so.30 "$lib"
+    done
+    wrapQtApp $out/app/bin/eidguiV2
+    autoPatchelf $out/app
+  '';
+
+  meta = {
+    description = "Middleware for Electronic Identification in Portugal (with precompiled binaries by AMA)";
+    homepage = "https://www.autenticacao.gov.pt/";
+    license = lib.licenses.eupl12;
+    longDescription = ''
+      This package provides the official Portuguese Citizen Card middleware (Autenticação.gov),
+      extracted from AMA’s Flatpak release. It enables authentication and digital signing using
+      the Portuguese eID system.
+
+      On NixOS, it works with a supported card reader and Citizen Card, as long as
+      `services.pcscd.enable = true` is set in the system configuration.
+
+      Notes:
+        - Depends on xerces-c 3.2.3, which is no longer in nixpkgs. This package includes a version
+          override to restore it for compatibility.
+
+        - The application uses hardcoded paths for libraries and binaries. To accommodate this,
+          `proot` is used at runtime to simulate a traditional filesystem layout. This allows the
+          binary to run unmodified, though it may introduce minor latency.
+
+        - A desktop entry is included for integration with graphical environments.
+
+      Building from source is possible, but upstream disables signing in source builds. Using the
+      official binary avoids this limitation and provides full functionality.
+    '';
+    maintainers = with lib.maintainers; [ vaavaav ];
+    platforms = lib.platforms.linux;
+  };
+}