diff --git a/pkgs/development/libraries/dlib/default.nix b/pkgs/development/libraries/dlib/default.nix
index 67a56855bb7..97d74e1ed3c 100644
--- a/pkgs/development/libraries/dlib/default.nix
+++ b/pkgs/development/libraries/dlib/default.nix
@@ -6,14 +6,14 @@
 }:
 
 stdenv.mkDerivation rec {
-  version = "19.16";
+  version = "19.17";
   name = "dlib-${version}";
 
   src = fetchFromGitHub {
     owner = "davisking";
     repo = "dlib";
     rev ="v${version}";
-    sha256 = "0ix52npsxfm6324jli7y0zkyijl5yirv2yzfncyd4sq0r9fcwb4p";
+    sha256 = "0g11ilma6cll3bd2ahm66j1sjb9v4rxz3xjbfkcg5pjsvb49n029";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/dlib/default.nix b/pkgs/development/python-modules/dlib/default.nix
index c200b6959b6..d9b3bb93264 100644
--- a/pkgs/development/python-modules/dlib/default.nix
+++ b/pkgs/development/python-modules/dlib/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, dlib, python, pytest, avxSupport ? true }:
+{ buildPythonPackage, dlib, python, pytest, more-itertools, avxSupport ? true, lib }:
 
 buildPythonPackage {
   inherit (dlib) name src nativeBuildInputs buildInputs meta;
@@ -10,9 +10,15 @@ buildPythonPackage {
     ${python.interpreter} nix_run_setup test --no USE_AVX_INSTRUCTIONS
   '';
 
-  setupPyBuildFlags = [ "--${if avxSupport then "yes" else "no"} USE_AVX_INSTRUCTIONS" ];
+  setupPyBuildFlags = lib.optional avxSupport "--no USE_AVX_INSTRUCTIONS";
 
   patches = [ ./build-cores.patch ];
 
-  checkInputs = [ pytest ];
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace "more-itertools<6.0.0" "more-itertools" \
+      --replace "pytest==3.8" "pytest"
+  '';
+
+  checkInputs = [ pytest more-itertools ];
 }