diff --git a/pkgs/development/libraries/zlib/default.nix b/pkgs/development/libraries/zlib/default.nix
index 8d7cb3a48c88..48603000c903 100644
--- a/pkgs/development/libraries/zlib/default.nix
+++ b/pkgs/development/libraries/zlib/default.nix
@@ -22,13 +22,13 @@ assert shared || static;
 assert splitStaticOutput -> static;
 
 stdenv.mkDerivation (rec {
-  name = "zlib-${version}";
+  pname = "zlib";
   version = "1.2.11";
 
   src = fetchurl {
     urls =
-      [ "https://www.zlib.net/fossils/${name}.tar.gz"  # stable archive path
-        "mirror://sourceforge/libpng/zlib/${version}/${name}.tar.gz"
+      [ "https://www.zlib.net/fossils/zlib-${version}.tar.gz"  # stable archive path
+        "mirror://sourceforge/libpng/zlib/${version}/zlib-${version}.tar.gz"
       ];
     sha256 = "c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1";
   };