diff --git a/pkgs/development/python-modules/commonmark/default.nix b/pkgs/development/python-modules/commonmark/default.nix
index 63d84f3da771..93eb03272863 100644
--- a/pkgs/development/python-modules/commonmark/default.nix
+++ b/pkgs/development/python-modules/commonmark/default.nix
@@ -1,7 +1,7 @@
 { lib, buildPythonPackage, fetchPypi, isPy3k, glibcLocales, future }:
 
 buildPythonPackage rec {
-  pname = "CommonMark";
+  pname = "commonmark";
   version = "0.8.1";
 
   src = fetchPypi {