diff --git a/pkgs/development/python-modules/cnvkit/default.nix b/pkgs/development/python-modules/cnvkit/default.nix
index d44e5e8fb71..5baa28e4bd7 100644
--- a/pkgs/development/python-modules/cnvkit/default.nix
+++ b/pkgs/development/python-modules/cnvkit/default.nix
@@ -2,7 +2,6 @@
 , fetchFromGitHub
 , fetchpatch
 , rPackages
-, rWrapper
 , buildPythonPackage
 , biopython
 , numpy