diff --git a/pkgs/vesc-tool/firmware.nix b/pkgs/vesc-tool/firmware.nix
index f2c31dd..9db0fdc 100644
--- a/pkgs/vesc-tool/firmware.nix
+++ b/pkgs/vesc-tool/firmware.nix
@@ -2,37 +2,41 @@
 , fetchFromGitHub
 , gcc-arm-embedded-7
 , python311
-, git
+, writeShellScriptBin
 }:
 
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   pname = "vesc-firmware";
   version = "master";
 
   src = fetchFromGitHub {
     owner = "vedderb";
     repo = "bldc";
-    rev = "f7c2b34e1cff2234cae98be3abf0cd50e249558f"; # release_6_02
-    sha256 = "BJwxmtYjQhxV8O0Ze9k0cPz0ubJnq5ePUd/9tGx35jo=";
+    rev = "dd3b97b041c325acfb95ac1adb550d28390ea253";
+    sha256 = "2Zex2FNkedO4wjG05CQIyVFU0i0/+O9V3LzsxHZOnvg=";
     fetchSubmodules = true;
   };
 
   nativeBuildInputs = [
     gcc-arm-embedded-7
     python311
-    git
+    (writeShellScriptBin "git" ''
+      if [ "$*" != "rev-parse --short HEAD" ]; then
+        exit 1
+      fi
+      echo "${src.rev}"
+    '')
   ];
 
   buildCommand = ''
-    set -x
     cp -r $src bldc
     (
       cd bldc
       chmod +w .
-      make fw_410 fw_60
+      make -j $NIX_BUILD_CORES fw_410 fw_60
+      python package_firmware.py
     )
     mkdir -p $out
-    find bldc
-    cp --target-directory=$out --recursive bldc/build/*/*.{bin,hex}
+    cp --recursive --target-directory=$out bldc/package/*
   '';
 }
diff --git a/pkgs/vesc-tool/tool.nix b/pkgs/vesc-tool/tool.nix
index 4043910..3cb591d 100644
--- a/pkgs/vesc-tool/tool.nix
+++ b/pkgs/vesc-tool/tool.nix
@@ -2,21 +2,9 @@
 , fetchFromGitHub
 , libsForQt5
 , vesc-firmware
-, writeText
 , qt5
 }:
 
-let
-  qresource = writeText "res_fw.qrc"
-    ''
-      <RCC>
-        <qresource>
-          <file>410.bin</file>
-          <file>60.bin</file>
-        </qresource>
-      </RCC>
-    '';
-in
 stdenv.mkDerivation {
   pname = "vesc_tool";
   version = "master";
@@ -24,8 +12,8 @@ stdenv.mkDerivation {
   src = fetchFromGitHub {
     owner = "vedderb";
     repo = "vesc_tool";
-    rev = "4a0edea5846d973e5da510fbe11ce009aaf21a96";
-    sha256 = "18ue6YBVcggr4qyHpCorrh01oeo4i58Jgp9Twaq+DlI=";
+    rev = "211f5d317542a3674df638405485a143a23f67ce";
+    sha256 = "liF2JbcrRtVPSySJhY7CHRghsBV3gKRGD40pKVD19wE=";
 
     fetchSubmodules = true;
   };
@@ -35,10 +23,6 @@ stdenv.mkDerivation {
     qt5.wrapQtAppsHook
   ];
 
-  buildInputs = [
-    vesc-firmware
-  ];
-
   propagatedBuildInputs = with qt5; [
     qtconnectivity
     qtgamepad
@@ -47,14 +31,15 @@ stdenv.mkDerivation {
     qtserialport
   ];
 
-  buildPhase = ''
-    mkdir -p res/firmwares/
-    cp ${qresource} res/firmwares/res_fw.qrc
-    cp ${vesc-firmware}/*.bin res/firmwares
+  dontConfigure = true;
 
+  buildPhase = ''
+    for f in ${vesc-firmware}/*; do
+      ln -s "$f" res/firmwares/
+    done
     qmake -config release "CONFIG += release_lin build_platinum"
     make clean
-    make -j8
+    make -j $NIX_BUILD_CORES
     rm -rf build/lin/obj
     mkdir -p $out/bin
     cp build/lin/* $out/bin