diff --git a/pkgs/development/python-modules/bluemaestro-ble/default.nix b/pkgs/development/python-modules/bluemaestro-ble/default.nix
index f82d98d94150..96da51be869d 100644
--- a/pkgs/development/python-modules/bluemaestro-ble/default.nix
+++ b/pkgs/development/python-modules/bluemaestro-ble/default.nix
@@ -10,16 +10,16 @@
   sensor-state-data,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "bluemaestro-ble";
-  version = "1.0.0";
+  version = "1.2.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "Bluetooth-Devices";
     repo = "bluemaestro-ble";
-    tag = "v${version}";
-    hash = "sha256-H7VAidnClMA/Qmc4ahzrmSaqkWj50zMjfakRD0wX8xM=";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-Uz4JE7ALfHxmdi7OesdJZqp4JhQdQGNwoiDxZyk8g9c=";
   };
 
   build-system = [ poetry-core ];
@@ -40,8 +40,8 @@ buildPythonPackage rec {
   meta = {
     description = "Library for bluemaestro BLE devices";
     homepage = "https://github.com/Bluetooth-Devices/bluemaestro-ble";
-    changelog = "https://github.com/Bluetooth-Devices/bluemaestro-ble/blob/v${version}/CHANGELOG.md";
+    changelog = "https://github.com/Bluetooth-Devices/bluemaestro-ble/blob/${finalAttrs.src.tag}/CHANGELOG.md";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})