diff --git a/pkgs/development/libraries/cxxtools/default.nix b/pkgs/development/libraries/cxxtools/default.nix
index 624594e588bb..8682c8ba8196 100644
--- a/pkgs/development/libraries/cxxtools/default.nix
+++ b/pkgs/development/libraries/cxxtools/default.nix
@@ -2,6 +2,7 @@
 , stdenv
 , fetchFromGitHub
 , fetchpatch
+, tzdata
 , autoreconfHook
 , openssl
 }:
@@ -28,6 +29,11 @@ stdenv.mkDerivation rec {
     })
   ];
 
+  postPatch = ''
+    substituteInPlace src/tz.cpp \
+      --replace '::getenv("TZDIR")' '"${tzdata}/share/zoneinfo"'
+  '';
+
   nativeBuildInputs = [
     autoreconfHook
   ];