diff --git a/pkgs/default.nix b/pkgs/default.nix
index 54a8b087..7cd77f1b 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -9,6 +9,10 @@ in
 
     mkEpicsPackage = callPackage ./build-support/mk-epics-package.nix {};
 
+    python3Packages = prev.python3Packages.overrideScope (final: prev: {
+      scanf = final.callPackage ./epnix/tools/scanf {};
+    });
+
     epnix = recurseExtensible (self: {
       # EPICS base
 
diff --git a/pkgs/epnix/tools/scanf/default.nix b/pkgs/epnix/tools/scanf/default.nix
new file mode 100644
index 00000000..959b33a3
--- /dev/null
+++ b/pkgs/epnix/tools/scanf/default.nix
@@ -0,0 +1,31 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchPypi,
+  setuptools,
+  wheel,
+}:
+buildPythonPackage rec {
+  pname = "scanf";
+  version = "1.5.2";
+  pyproject = true;
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-V2M0QKAqE4zRS2k9CScK8KA7sBfo1M/SSMeYizG4y4E=";
+  };
+
+  nativeBuildInputs = [
+    setuptools
+    wheel
+  ];
+
+  pythonImportsCheck = ["scanf"];
+
+  meta = with lib; {
+    description = "A small scanf implementation";
+    homepage = "https://pypi.org/project/scanf/";
+    license = licenses.mit;
+    maintainers = with maintainers; [minijackson];
+  };
+}