diff --git a/flake.lock b/flake.lock
index c5cd20b..03b4e3b 100644
--- a/flake.lock
+++ b/flake.lock
@@ -33,6 +33,22 @@
         "type": "github"
       }
     },
+    "ath11k-firmware": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1720482684,
+        "narHash": "sha256-p6ifwtRNUOyQ2FN2VhSXS6dcrvrtiFZawu/iVXQ4uR0=",
+        "ref": "refs/heads/main",
+        "rev": "bb527dcebac835c47ed4f5428a7687769fa9b1b2",
+        "revCount": 152,
+        "type": "git",
+        "url": "https://git.codelinaro.org/clo/ath-firmware/ath11k-firmware.git"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://git.codelinaro.org/clo/ath-firmware/ath11k-firmware.git"
+      }
+    },
     "brainwart_x13s-nixos": {
       "flake": false,
       "locked": {
@@ -823,6 +839,7 @@
       "inputs": {
         "adamcstephens_stop-export": "adamcstephens_stop-export",
         "aphorme_launcher": "aphorme_launcher",
+        "ath11k-firmware": "ath11k-firmware",
         "brainwart_x13s-nixos": "brainwart_x13s-nixos",
         "colmena": "colmena",
         "crane": "crane",
@@ -860,6 +877,7 @@
         "salut": "salut",
         "sops-nix": "sops-nix",
         "srvos": "srvos",
+        "x13s-bt-firmware": "x13s-bt-firmware",
         "yofi": "yofi"
       }
     },
@@ -1057,6 +1075,18 @@
         "type": "github"
       }
     },
+    "x13s-bt-firmware": {
+      "flake": false,
+      "locked": {
+        "narHash": "sha256-FCWkZp+MtEGS5lS5+pxmpCl4wU9GGRegolebcmCN7RU=",
+        "type": "file",
+        "url": "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/qca/hpbtfw21.tlv?id=2ba1beaae0c649ce8a50baecc8df9e81cd524e65"
+      },
+      "original": {
+        "type": "file",
+        "url": "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/qca/hpbtfw21.tlv?id=2ba1beaae0c649ce8a50baecc8df9e81cd524e65"
+      }
+    },
     "yofi": {
       "inputs": {
         "flake-utils": "flake-utils_4",
diff --git a/flake.nix b/flake.nix
index 768c194..a63a5c2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -119,6 +119,31 @@
       flake = false;
       url = "github:espanso/espanso/db97658d1d80697a635b57801696c594eacf057b";
     };
+
+    x13s-bt-firmware = {
+      flake = false;
+
+      # revisions for this file: https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/log/qca/hpbtfw21.tlv
+
+      # 2024-07-29
+      # not working well
+      # url = "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/qca/hpbtfw21.tlv?id=d118dc8ad5562ac0ae0c07be748cbe35a9361b47";
+
+      # 2024-05-30
+      # url = "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/qca/hpbtfw21.tlv?id=436b0a920352d13290043d9ec9e50c420ab10f92";
+
+      # 2023-12-18
+      # not working well
+      # url = "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/qca/hpbtfw21.tlv?id=598f5bd22361d7e92eebe8452d1f8013a1d35b9a";
+
+      # 2013-01-17
+      url = "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/qca/hpbtfw21.tlv?id=2ba1beaae0c649ce8a50baecc8df9e81cd524e65";
+    };
+
+    ath11k-firmware = {
+      url = "git+https://git.codelinaro.org/clo/ath-firmware/ath11k-firmware.git";
+      flake = false;
+    };
   };
 
   outputs = inputs @ {
@@ -337,6 +362,18 @@
             buildInputs = [
             ];
           };
+
+          x13s-bt-firmware = pkgs.runCommand "x13s-bt-firmware" {} ''
+            mkdir -p $out/lib/firmware/qca
+            cp -v ${self}/misc/x13s_bt_firmware/hpnv21g.b8c.crypt.fw $out/lib/firmware/qca/hpnv21.bin
+            cp -v ${inputs.x13s-bt-firmware} $out/lib/firmware/qca//hpbtfw21.tlv
+          '';
+
+          x13s-ath11k-firmware = pkgs.runCommand "x13s-ath11k-firmware-before" {} ''
+            mkdir -p $out/lib/firmware/ath11k/WCN6855/hw2.1/
+            cp -v ${inputs.ath11k-firmware}/WCN6855/hw2.1/{board-2,regdb}.bin $out/lib/firmware/ath11k/WCN6855/hw2.1/
+            cp -v ${inputs.ath11k-firmware}/WCN6855/hw2.1/1.1/WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.41/{amss,m3}.bin $out/lib/firmware/ath11k/WCN6855/hw2.1/
+          '';
         };
 
         formatter = pkgs.alejandra;
diff --git a/misc/x13s_bt_firmware/hpnv21g.b8c.crypt.fw b/misc/x13s_bt_firmware/hpnv21g.b8c.crypt.fw
new file mode 100755
index 0000000..ea5b5b8
Binary files /dev/null and b/misc/x13s_bt_firmware/hpnv21g.b8c.crypt.fw differ
diff --git a/nix/os/devices/steveej-x13s/configuration.nix b/nix/os/devices/steveej-x13s/configuration.nix
index 16727f0..3068a0a 100644
--- a/nix/os/devices/steveej-x13s/configuration.nix
+++ b/nix/os/devices/steveej-x13s/configuration.nix
@@ -7,6 +7,7 @@
   nodeName,
   localDomainName,
   system,
+  packages',
   ...
 }: {
   nixpkgs.overlays = [
@@ -236,7 +237,8 @@
   };
 
   hardware.firmware = lib.mkBefore [
-    nodeFlake.packages.${system}.x13s-ath11k-firmware
+    packages'.x13s-bt-firmware
+    packages'.x13s-ath11k-firmware
   ];
 
   # see https://linrunner.de/tlp/
diff --git a/nix/os/devices/steveej-x13s/flake.nix b/nix/os/devices/steveej-x13s/flake.nix
index 4e3f1a9..d749c07 100644
--- a/nix/os/devices/steveej-x13s/flake.nix
+++ b/nix/os/devices/steveej-x13s/flake.nix
@@ -20,9 +20,11 @@
     # nixos-x13s.inputs.nixpkgs.follows = "nixpkgs";
 
     mycelium.url = "github:threefoldtech/mycelium";
-    ath11k-firmware = {
-      url = "git+https://git.codelinaro.org/clo/ath-firmware/ath11k-firmware.git";
-      flake = false;
+
+    nix-snapshotter = {
+      url = "github:yu-re-ka/nix-snapshotter";
+      # url = "github:pdtpartners/nix-snapshotter";
+      inputs.nixpkgs.follows = "nixpkgs";
     };
 
     nix-snapshotter = {
@@ -99,11 +101,6 @@
       };
     };
     packages.${targetPlatform} = {
-      x13s-ath11k-firmware = nixpkgs.legacyPackages.${targetPlatform}.runCommand "x13s-ath11k-firmware-before" {} ''
-        mkdir -p $out/lib/firmware/ath11k/WCN6855/hw2.1/
-        cp -v ${ath11k-firmware}/WCN6855/hw2.1/{board-2,regdb}.bin $out/lib/firmware/ath11k/WCN6855/hw2.1/
-        cp -v ${ath11k-firmware}/WCN6855/hw2.1/1.1/WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.41/{amss,m3}.bin $out/lib/firmware/ath11k/WCN6855/hw2.1/
-      '';
     };
   };
 }