diff --git a/nix/pkgs/default.nix b/nix/pkgs/default.nix
index 226768a24d..dc52993ec7 100644
--- a/nix/pkgs/default.nix
+++ b/nix/pkgs/default.nix
@@ -11,4 +11,5 @@ args: {
   copybara = import ./copybara.nix args;
   hg-git = import ./hg-git.nix args;
   erbium = import ./erbium args;
+  python-emv = import ./python-emv.nix args;
 } // (import ./heptapod-runner.nix args)
diff --git a/nix/pkgs/python-emv.nix b/nix/pkgs/python-emv.nix
new file mode 100644
index 0000000000..f1bc02ac22
--- /dev/null
+++ b/nix/pkgs/python-emv.nix
@@ -0,0 +1,39 @@
+# SPDX-FileCopyrightText: 2020 Luke Granger-Brown <depot@lukegb.com>
+#
+# SPDX-License-Identifier: Apache-2.0
+
+{ pkgs, ... }:
+with pkgs;
+with pkgs.python3Packages;
+buildPythonPackage rec {
+  pname = "python-emv";
+  version = "1.0.9";
+
+  src = fetchFromGitHub {
+    owner = "russss";
+    repo = "python-emv";
+    rev = "v${version}";
+    hash = "sha256:1ldibcy1wgnaimf8ri79lg8im1mhfqajrigfflvizw0hb0ivh8al";
+  };
+
+  checkInputs = [ pytestCheckHook unittest2 ];
+  propagatedBuildInputs = [
+    enum-compat
+    click
+    pyscard
+    pycountry
+    terminaltables
+  ];
+
+  # argparse is part of the standardlib
+  prePatch = ''
+    substituteInPlace setup.py --replace '"argparse",' ""
+  '';
+
+  meta = with stdenv.lib; {
+    homepage = "https://github.com/russss/python-emv";
+    description = "A Python implementation of the EMV smartcard protocol, used for chip-and-PIN payments";
+    license = licenses.mit;
+    maintainers = with maintainers; [ lukegb ];
+  };
+}