diff --git a/pkgs/development/libraries/serf/default.nix b/pkgs/development/libraries/serf/default.nix
index 092ab62ed7c8..5b603e6a0c7f 100644
--- a/pkgs/development/libraries/serf/default.nix
+++ b/pkgs/development/libraries/serf/default.nix
@@ -2,10 +2,11 @@
 , pkg-config, libiconv }:
 
 stdenv.mkDerivation rec {
-  name = "serf-1.3.9";
+  pname = "serf";
+  version = "1.3.9";
 
   src = fetchurl {
-    url = "https://www.apache.org/dist/serf/${name}.tar.bz2";
+    url = "https://www.apache.org/dist/serf/${pname}-${version}.tar.bz2";
     sha256 = "1k47gbgpp52049andr28y28nbwh9m36bbb0g8p0aka3pqlhjv72l";
   };