diff --git a/pkgs/by-name/tc/tcptrack/package.nix b/pkgs/by-name/tc/tcptrack/package.nix
index e50ff6c60c5f..c48e4c494b87 100644
--- a/pkgs/by-name/tc/tcptrack/package.nix
+++ b/pkgs/by-name/tc/tcptrack/package.nix
@@ -9,7 +9,7 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "tcptrack";
-  version = "unstable-2017-04-29";
+  version = "1.4.3-unstable-2017-04-29";
 
   src = fetchFromGitHub {
     owner = "bchretien";