diff --git a/pkgs/development/libraries/libktorrent/default.nix b/pkgs/development/libraries/libktorrent/default.nix
index f048e5043de..d80d9da4f7e 100644
--- a/pkgs/development/libraries/libktorrent/default.nix
+++ b/pkgs/development/libraries/libktorrent/default.nix
@@ -2,15 +2,19 @@
   perl }:
 
 stdenv.mkDerivation rec {
-  name = "libktorrent-1.0.2";
+  name = pname + "-" + version;
+  pname = "libktorrent";
+  version = "1.0.3";
 
   src = fetchurl {
-    url = "${meta.homepage}/downloads/4.0.2/${name}.tar.bz2";
-    sha256 = "11kh1mcijwzr2kf7hpxadggh346kdb5jy8rnmawhi9nc0i7wyjlw";
+    url = "${meta.homepage}/downloads/4${builtins.substring 1
+      (builtins.stringLength version) version}/${name}.tar.bz2";
+    sha256 = "1yfayzbmi7im0pf4g7awn8lqianpr55xwbsldz7lyj9lc1a3xcgs";
   };
 
 # TODO: xfs.h
-  buildInputs = [ cmake kdelibs gmp qca2 boost gettext qt4 automoc4 perl ];
+  propagatedBuildInputs = [ kdelibs gmp boost qt4 ];
+  buildInputs = [ cmake automoc4 qca2 gettext perl ];
 
   meta = {
     description = "A bittorrent library used in ktorrent";