diff --git a/pkgs/applications/networking/mailreaders/claws-mail/default.nix b/pkgs/applications/networking/mailreaders/claws-mail/default.nix
index a783cb2af3f8..47a104b252c3 100644
--- a/pkgs/applications/networking/mailreaders/claws-mail/default.nix
+++ b/pkgs/applications/networking/mailreaders/claws-mail/default.nix
@@ -31,11 +31,11 @@ with stdenv.lib;
 
 stdenv.mkDerivation rec {
   name = "claws-mail-${version}";
-  version = "3.17.2";
+  version = "3.17.3";
 
   src = fetchurl {
     url = "http://www.claws-mail.org/download.php?file=releases/claws-mail-${version}.tar.xz";
-    sha256 = "1hb17kpvfl8f1y49zan0wvf4awapxg13bqbqwrbhq2n4xp445kr5";
+    sha256 = "1wnj6c9cbmhphs2l6wfvndkk2g08rmxw0sl2c8k1k008dxd1ykjh";
   };
 
   outputs = [ "out" "dev" ];
diff --git a/pkgs/development/python-modules/hpack/default.nix b/pkgs/development/python-modules/hpack/default.nix
index a10882417fc0..7e7db13aaec1 100644
--- a/pkgs/development/python-modules/hpack/default.nix
+++ b/pkgs/development/python-modules/hpack/default.nix
@@ -1,6 +1,7 @@
 { stdenv
 , buildPythonPackage
 , fetchPypi
+, glibcLocales
 }:
 
 buildPythonPackage rec {
@@ -12,6 +13,10 @@ buildPythonPackage rec {
     sha256 = "8eec9c1f4bfae3408a3f30500261f7e6a65912dc138526ea054f9ad98892e9d2";
   };
 
+  buildInputs = [ glibcLocales ];
+
+  LANG = "en_US.UTF-8";
+
   meta = with stdenv.lib; {
     description = "Pure-Python HPACK header compression";
     homepage = "http://hyper.rtfd.org";
diff --git a/pkgs/development/tools/profiling/systemtap/default.nix b/pkgs/development/tools/profiling/systemtap/default.nix
index ecc86d51a06e..6b1918a5d982 100644
--- a/pkgs/development/tools/profiling/systemtap/default.nix
+++ b/pkgs/development/tools/profiling/systemtap/default.nix
@@ -6,8 +6,8 @@ let
   ## fetchgit info
   url = git://sourceware.org/git/systemtap.git;
   rev = "release-${version}";
-  sha256 = "0hckbmrlcz5nj438409fmdjjaaqzf68r2242v10lkssw5daia1gj";
-  version = "3.3";
+  sha256 = "075p45ndr4pzrf5679hcsw1ws4x0xqvx3m037v04545762hki6la";
+  version = "4.0";
 
   inherit (kernel) stdenv;
   inherit (stdenv) lib;