diff --git a/pkgs/tools/system/which/default.nix b/pkgs/tools/system/which/default.nix
index 3721c0f0be1a..fc40cd4722bb 100644
--- a/pkgs/tools/system/which/default.nix
+++ b/pkgs/tools/system/which/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, readline}:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation {
   name = "which-2.20";
@@ -8,8 +8,6 @@ stdenv.mkDerivation {
     sha256 = "1y2p50zadb36izzh2zw4dm5hvdiydqf3qa88l8kav20dcmfbc5yl";
   };
 
-  buildInputs = [readline];
-
   meta = {
     homepage = http://ftp.gnu.org/gnu/which/;
   };