diff --git a/pkgs/tools/security/scrypt/default.nix b/pkgs/tools/security/scrypt/default.nix
index d834e4acd9c..66b5afc9a9b 100644
--- a/pkgs/tools/security/scrypt/default.nix
+++ b/pkgs/tools/security/scrypt/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, openssl, utillinux }:
+{ stdenv, fetchurl, openssl, utillinux, getconf }:
 
 stdenv.mkDerivation rec {
   pname = "scrypt";
@@ -15,6 +15,8 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ openssl ];
 
+  nativeBuildInputs = [ getconf ];
+
   patchPhase = ''
     for f in Makefile.in autotools/Makefile.am libcperciva/cpusupport/Build/cpusupport.sh configure ; do
       substituteInPlace $f --replace "command -p " ""