diff --git a/pkgs/applications/networking/instant-messengers/qtox/default.nix b/pkgs/applications/networking/instant-messengers/qtox/default.nix
index 952182def26..2605d6dc081 100644
--- a/pkgs/applications/networking/instant-messengers/qtox/default.nix
+++ b/pkgs/applications/networking/instant-messengers/qtox/default.nix
@@ -1,24 +1,19 @@
-{ stdenv, mkDerivation, lib, fetchFromGitHub, cmake, pkgconfig
-, libtoxcore
-, libpthreadstubs, libXdmcp, libXScrnSaver
+{ stdenv, mkDerivation, fetchFromGitHub, cmake, pkg-config, perl
+, libtoxcore, libpthreadstubs, libXdmcp, libXScrnSaver
 , qtbase, qtsvg, qttools, qttranslations
 , ffmpeg_3, filter-audio, libexif, libsodium, libopus
 , libvpx, openal, pcre, qrencode, sqlcipher
-, AVFoundation ? null }:
+, AVFoundation }:
 
-let
-  version = "1.17.3";
-  rev = "v${version}";
-
-in mkDerivation {
+mkDerivation rec {
   pname = "qtox";
-  inherit version;
+  version = "1.17.3";
 
   src = fetchFromGitHub {
-    owner  = "qTox";
-    repo   = "qTox";
+    owner = "qTox";
+    repo = "qTox";
+    rev = "v${version}";
     sha256 = "19xgw9bqirxbgvj5cdh20qxh61pkwk838lq1l78n6py1qrs7z5wp";
-    inherit rev;
   };
 
   buildInputs = [
@@ -27,25 +22,24 @@ in mkDerivation {
     qtbase qtsvg qttranslations
     ffmpeg_3 filter-audio libexif libopus libsodium
     libvpx openal pcre qrencode sqlcipher
-  ] ++ lib.optionals stdenv.isDarwin [ AVFoundation] ;
+  ] ++ stdenv.lib.optionals stdenv.isDarwin [ AVFoundation] ;
 
-  nativeBuildInputs = [ cmake pkgconfig qttools ];
-
-  enableParallelBuilding = true;
+  nativeBuildInputs = [ cmake pkg-config qttools ]
+    ++ stdenv.lib.optionals stdenv.isDarwin [ perl ];
 
   cmakeFlags = [
-    "-DGIT_DESCRIBE=${rev}"
+    "-DGIT_DESCRIBE=v${version}"
     "-DENABLE_STATUSNOTIFIER=False"
     "-DENABLE_GTK_SYSTRAY=False"
     "-DENABLE_APPINDICATOR=False"
     "-DTIMESTAMP=1"
   ];
 
-  meta = with lib; {
+  meta = with stdenv.lib; {
     description = "Qt Tox client";
-    homepage    = "https://tox.chat";
-    license     = licenses.gpl3;
+    homepage = "https://tox.chat";
+    license = licenses.gpl3;
     maintainers = with maintainers; [ akaWolf peterhoeg ];
-    platforms   = platforms.all;
+    platforms = platforms.all;
   };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 8d4fab92a52..bc2451be96b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -23605,7 +23605,9 @@ in
 
   qtemu = libsForQt5.callPackage ../applications/virtualization/qtemu { };
 
-  qtox = libsForQt5.callPackage ../applications/networking/instant-messengers/qtox { };
+  qtox = libsForQt5.callPackage ../applications/networking/instant-messengers/qtox {
+    inherit (darwin.apple_sdk.frameworks) AVFoundation;
+  };
 
   qtpass = libsForQt5.callPackage ../applications/misc/qtpass { };