diff --git a/pkgs/development/python-modules/flexit-bacnet/default.nix b/pkgs/development/python-modules/flexit-bacnet/default.nix
new file mode 100644
index 000000000000000..1fdad51d39b012d
--- /dev/null
+++ b/pkgs/development/python-modules/flexit-bacnet/default.nix
@@ -0,0 +1,34 @@
+{
+  buildPythonPackage,
+  fetchFromGitHub,
+  lib,
+  setuptools,
+}:
+
+buildPythonPackage rec {
+  pname = "flexit-bacnet";
+  version = "2.2.1";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "piotrbulinski";
+    repo = "flexit_bacnet";
+    rev = "refs/tags/${version}";
+    hash = "sha256-Cy/WHKtJoZWSFOs+9rBYSLqZTF/68WRM1HiYXDyb9KM=";
+  };
+
+  build-system = [ setuptools ];
+
+  pythonImportsCheck = [ "flexit_bacnet" ];
+
+  # upstream has no tests
+  doCheck = false;
+
+  meta = {
+    changelog = "https://github.com/piotrbulinski/flexit_bacnet/releases/tag/${version}";
+    description = "Client BACnet library for Flexit Nordic series of air handling units";
+    homepage = "https://github.com/piotrbulinski/flexit_bacnet";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ dotlambda ];
+  };
+}
diff --git a/pkgs/servers/home-assistant/component-packages.nix b/pkgs/servers/home-assistant/component-packages.nix
index 69be32c12051999..67cca39575c5cae 100644
--- a/pkgs/servers/home-assistant/component-packages.nix
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -1265,7 +1265,8 @@
       pymodbus
     ];
     "flexit_bacnet" = ps: with ps; [
-    ]; # missing inputs: flexit_bacnet
+      flexit-bacnet
+    ];
     "flexom" = ps: with ps; [
     ];
     "flic" = ps: with ps; [
@@ -5046,6 +5047,7 @@
     "fitbit"
     "fivem"
     "fjaraskupan"
+    "flexit_bacnet"
     "flic"
     "flick_electric"
     "flipr"
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index c24f453d6f9a039..cf49725db571b41 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -4536,6 +4536,8 @@ self: super: with self; {
 
   flexcache = callPackage ../development/python-modules/flexcache { };
 
+  flexit-bacnet = callPackage ../development/python-modules/flexit-bacnet { };
+
   flexmock = callPackage ../development/python-modules/flexmock { };
 
   flexparser = callPackage ../development/python-modules/flexparser { };