diff --git a/pkgs/tools/graphics/graph-easy/default.nix b/pkgs/tools/graphics/graph-easy/default.nix
index b12a56c963e..4f3b89eea91 100644
--- a/pkgs/tools/graphics/graph-easy/default.nix
+++ b/pkgs/tools/graphics/graph-easy/default.nix
@@ -1,7 +1,7 @@
 { lib, perlPackages, fetchurl }:
 
 perlPackages.buildPerlPackage {
-  pname = "Graph-Easy";
+  pname = "graph-easy";
   version = "0.76";
   src = fetchurl {
     url = "mirror://cpan/authors/id/S/SH/SHLOMIF/Graph-Easy-0.76.tar.gz";