diff --git a/pkgs/tools/security/mkpasswd/default.nix b/pkgs/tools/security/mkpasswd/default.nix
index b8da305c36d1..3d30fef02e29 100644
--- a/pkgs/tools/security/mkpasswd/default.nix
+++ b/pkgs/tools/security/mkpasswd/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation {
 
   src = whois.src;
 
-  buildInputs = [ perl ];
+  nativeBuildInputs = [ perl ];
 
   preConfigure = whois.preConfigure;
   buildPhase = "make mkpasswd";