diff --git a/pkgs/default.nix b/pkgs/default.nix
index aa651b9..0d5d8a9 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -22,6 +22,7 @@ in
           pvxslibs = final.callPackage ./epnix/python-modules/pvxslibs {};
           aioca = final.callPackage ./epnix/python-modules/aioca/default.nix {};
           epicsdbbuilder = final.callPackage ./epnix/python-modules/epicsdbbuilder {};
+          softioc = final.callPackage ./epnix/python-modules/softioc {};
 
           # epicscorelibs needs at least 2.11.
           # TODO: remove for NixOS 24.11
@@ -93,7 +94,7 @@ in
 
       channel-finder-service = callPackage ./epnix/tools/channel-finder/service {};
 
-      inherit (final.python3Packages) lewis pyepics aioca;
+      inherit (final.python3Packages) lewis pyepics aioca softioc;
       inherit (callPackage ./epnix/tools/lewis/lib.nix {}) mkLewisSimulator;
 
       pcas = callPackage ./epnix/tools/pcas {};
diff --git a/pkgs/epnix/python-modules/softioc/default.nix b/pkgs/epnix/python-modules/softioc/default.nix
new file mode 100644
index 0000000..8bf8d14
--- /dev/null
+++ b/pkgs/epnix/python-modules/softioc/default.nix
@@ -0,0 +1,38 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchgit,
+  setuptools,
+  epicscorelibs,
+  pvxslibs,
+  epicsdbbuilder,
+  epnixLib,
+}:
+buildPythonPackage rec {
+  pname = "softioc";
+  version = "4.5.0";
+
+  pyproject = true;
+
+  src = fetchgit {
+    url = "https://github.com/DiamondLightSource/pythonSoftIOC.git";
+    rev = version;
+    fetchSubmodules = true;
+    hash = "sha256-JXfFkA3MzipqUw0riMTZmgCP9qe4Tfj8vZaFBwqoO+c=";
+  };
+
+  # Set correct version instead of automatically detected version:
+  postPatch = ''
+    awk -i inplace "/__version__/ && !x {print; print \"__version__ = '${version}'\"; x=1; next} 1" setup.py
+  '';
+
+  build-system = [setuptools];
+  dependencies = [setuptools epicscorelibs epicsdbbuilder pvxslibs];
+
+  meta = {
+    description = "Embed an EPICS IOC in a Python process";
+    homepage = "https://DiamondLightSource.github.io/pythonSoftIOC";
+    license = lib.licenses.asl20;
+    maintainers = with epnixLib.maintainers; [synthetica];
+  };
+}