diff --git a/pkgs/os-specific/linux/firmware/xow_dongle-firmware/default.nix b/pkgs/os-specific/linux/firmware/xow_dongle-firmware/default.nix
index 0375eb0eead8..72e3817f2aa2 100644
--- a/pkgs/os-specific/linux/firmware/xow_dongle-firmware/default.nix
+++ b/pkgs/os-specific/linux/firmware/xow_dongle-firmware/default.nix
@@ -4,8 +4,8 @@ stdenv.mkDerivation rec {
   pname = "xow_dongle-firmware";
   version = "2017-07";
 
-  dontUnpack = true;
-  dontInstall = true;
+  dontConfigure = true;
+  dontBuild = true;
 
   src = fetchurl {
     url = "http://download.windowsupdate.com/c/msdownload/update/driver/drvs/2017/07/1cd6a87c-623f-4407-a52d-c31be49e925c_e19f60808bdcbfbd3c3df6be3e71ffc52e43261e.cab";
@@ -14,10 +14,14 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cabextract ];
 
-  buildPhase = ''
+  sourceRoot = "./.";
+
+  unpackCmd = ''
     cabextract -F FW_ACC_00U.bin ${src}
-    mkdir -p $out/lib/firmware
-    cp -a FW_ACC_00U.bin $out/lib/firmware/xow_dongle.bin
+  '';
+
+  installPhase = ''
+    install -Dm644 FW_ACC_00U.bin ${placeholder "out"}/lib/firmware/xow_dongle.bin
   '';
 
   meta = with lib; {