diff --git a/pkgs/tools/text/par/default.nix b/pkgs/tools/text/par/default.nix
index 5f9ca5212d3..88325c38731 100644
--- a/pkgs/tools/text/par/default.nix
+++ b/pkgs/tools/text/par/default.nix
@@ -1,7 +1,8 @@
 {stdenv, fetchurl, fetchpatch}:
 
 stdenv.mkDerivation {
-  name = "par-1.52";
+  pname = "par";
+  version = "1.52";
 
   src = fetchurl {
     url = http://www.nicemice.net/par/Par152.tar.gz;