diff --git a/pkgs/development/tools/misc/kcachegrind/default.nix b/pkgs/development/tools/misc/kcachegrind/default.nix
index a433dd13ddd..962ac92bd31 100644
--- a/pkgs/development/tools/misc/kcachegrind/default.nix
+++ b/pkgs/development/tools/misc/kcachegrind/default.nix
@@ -1,7 +1,7 @@
 {stdenv, fetchurl, kdelibs}:
 
 stdenv.mkDerivation {
-  name = "/kcachegrind-0.4.6";
+  name = "kcachegrind-0.4.6";
   src = fetchurl {
     url = http://kcachegrind.sourceforge.net/kcachegrind-0.4.6.tar.gz;
     md5 = "4ed60028dcefd6bf626635d5f2f50273";