diff --git a/pkgs/tools/misc/man/default.nix b/pkgs/tools/misc/man/default.nix
index fb68df823278..cc5166d6648e 100644
--- a/pkgs/tools/misc/man/default.nix
+++ b/pkgs/tools/misc/man/default.nix
@@ -1,7 +1,7 @@
 {stdenv, fetchurl, db4, groff}:
  
 stdenv.mkDerivation {
-  name = "man_db-2.4.3";
+  name = "man-2.4.3";
   src = fetchurl {
     url = http://nix.cs.uu.nl/dist/tarballs/man-db-2.4.3.tar.gz;
     md5 = "30814a47f209f43b152659ba51fc7937";