diff --git a/pkgs/by-name/si/simpleBluez/package.nix b/pkgs/by-name/si/simplebluez/package.nix
similarity index 72%
rename from pkgs/by-name/si/simpleBluez/package.nix
rename to pkgs/by-name/si/simplebluez/package.nix
index 97ad1fe35b7d..c365edb6e432 100644
--- a/pkgs/by-name/si/simpleBluez/package.nix
+++ b/pkgs/by-name/si/simplebluez/package.nix
@@ -8,15 +8,15 @@
   lib,
 }:
 stdenv.mkDerivation (finalAttrs: {
-  pname = "simpleBluez";
+  pname = "simplebluez";
 
-  version = "0.7.3";
+  version = "0.11.0";
 
   src = fetchFromGitHub {
     owner = "OpenBluetoothToolbox";
     repo = "SimpleBLE";
     rev = "v${finalAttrs.version}";
-    hash = "sha256-CPBdPnBeQ0c3VjSX0Op6nCHF3w0MdXGULbk1aavr+LM=";
+    hash = "sha256-SWZdVWBC8udwkn195FdvsXSniMtzd8+WfnMsARLYSQ4=";
   };
 
   outputs = [
@@ -40,7 +40,9 @@ stdenv.mkDerivation (finalAttrs: {
   meta = {
     description = "C++ abstraction layer for BlueZ over DBus";
     homepage = "https://github.com/OpenBluetoothToolbox/SimpleBLE";
-    license = lib.licenses.gpl3Only;
+    # SimpleBLE (which SimpleBluez is part of) is under the Business Source License 1.1 (BUSL-1.1)
+    # since version 0.9.0
+    license = lib.licenses.bsl11;
     platforms = lib.platforms.linux;
     maintainers = with lib.maintainers; [ aciceri ];
   };
diff --git a/pkgs/by-name/si/simpledbus/package.nix b/pkgs/by-name/si/simpledbus/package.nix
index 1c1b91098107..60cba79849be 100644
--- a/pkgs/by-name/si/simpledbus/package.nix
+++ b/pkgs/by-name/si/simpledbus/package.nix
@@ -10,13 +10,13 @@
 stdenv.mkDerivation (finalAttrs: {
   pname = "simpledbus";
 
-  version = "0.10.4";
+  version = "0.11.0";
 
   src = fetchFromGitHub {
     owner = "OpenBluetoothToolbox";
     repo = "SimpleBLE";
     rev = "v${finalAttrs.version}";
-    hash = "sha256-KNSrw+NhfHRuvDwkWpWTSnP6LWoSVWAa33fVikb60A8=";
+    hash = "sha256-SWZdVWBC8udwkn195FdvsXSniMtzd8+WfnMsARLYSQ4=";
   };
 
   outputs = [
diff --git a/pkgs/by-name/zm/zmkBATx/package.nix b/pkgs/by-name/zm/zmkbatx/package.nix
similarity index 76%
rename from pkgs/by-name/zm/zmkBATx/package.nix
rename to pkgs/by-name/zm/zmkbatx/package.nix
index d600789f71b9..c3ef149ed40e 100644
--- a/pkgs/by-name/zm/zmkBATx/package.nix
+++ b/pkgs/by-name/zm/zmkbatx/package.nix
@@ -5,11 +5,23 @@
   qt6,
   pkg-config,
   dbus,
-  simpleBluez,
+  simplebluez,
   simpledbus,
 }:
+let
+  # zmkBATx is incompatible against the new ABI
+  simplebluez' = simplebluez.overrideAttrs rec {
+    version = "0.7.3";
+    src = fetchFromGitHub {
+      owner = "OpenBluetoothToolbox";
+      repo = "SimpleBLE";
+      rev = "v${version}";
+      hash = "sha256-CPBdPnBeQ0c3VjSX0Op6nCHF3w0MdXGULbk1aavr+LM=";
+    };
+  };
+in
 stdenv.mkDerivation (finalAttrs: {
-  pname = "zmkBATx";
+  pname = "zmkbatx";
 
   version = "1.0.1";
 
@@ -30,8 +42,8 @@ stdenv.mkDerivation (finalAttrs: {
     qt6.qtbase
     qt6.qtconnectivity
     dbus.lib
-    simpleBluez
     simpledbus
+    simplebluez'
   ];
 
   postPatch = ''
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index c433e5a3c563..44600cc590d9 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -1738,6 +1738,7 @@ mapAliases {
   siduck76-st = throw "'siduck76-st' has been renamed to/replaced by 'st-snazzy'"; # Converted to throw 2025-10-27
   sierra-breeze-enhanced = throw "'sierra-breeze-enhanced' has been removed, as it is only compatible with Plasma 5, which is EOL"; # Added 2025-08-20
   signal-desktop-source = throw "'signal-desktop-source' has been renamed to/replaced by 'signal-desktop'"; # Converted to throw 2025-10-27
+  simpleBluez = warnAlias "'simpleBluez' has been renamed to 'simplebluez'" simplebluez; # Added 2026-02-18
   simpleDBus = warnAlias "'simpleDBus' has been renamed to 'simpledbus'" simpledbus; # Added 2026-02-12
   simplesamlphp = throw "'simplesamlphp' was removed because it was unmaintained in nixpkgs"; # Added 2025-10-17
   simpleTpmPk11 = warnAlias "'simpleTpmPk11' has been renamed to 'simple-tpm-pk11'" simple-tpm-pk11; # Added 2026-02-12
@@ -2402,6 +2403,7 @@ mapAliases {
   zigbee2mqtt_2 = zigbee2mqtt; # Added 2025-08-11
   zinc = throw "'zinc' has been renamed to/replaced by 'zincsearch'"; # Converted to throw 2025-10-27
   zint = throw "'zint' has been renamed to/replaced by 'zint-qt'"; # Converted to throw 2025-10-27
+  zmkBATx = warnAlias "'zmkBATx' has been renamed to 'zmkbatx'" zmkbatx; # Added 2026-02-18
   zombietrackergps = throw "'zombietrackergps' has been dropped, as it depends on KDE Gear 5 and is unmaintained"; # Added 2025-08-20
   zotero_7 = throw "'zotero_7' has been renamed to/replaced by 'zotero'"; # Added 2025-12-09
   zotify = throw "zotify has been removed due to lack of upstream maintenance"; # Added 2025-09-26