diff --git a/pkgs/development/ocaml-modules/ocsigen-server/default.nix b/pkgs/development/ocaml-modules/ocsigen-server/default.nix
index 1d283e5e55ea..c8e60015d013 100644
--- a/pkgs/development/ocaml-modules/ocsigen-server/default.nix
+++ b/pkgs/development/ocaml-modules/ocsigen-server/default.nix
@@ -1,7 +1,7 @@
 {stdenv, fetchurl, ocaml, findlib, which, ocaml_react, ocaml_ssl,
 lwt, ocamlnet, ocaml_pcre, cryptokit, tyxml, ipaddr, zlib,
 libev, openssl, ocaml_sqlite3, tree, uutf, makeWrapper, camlp4
-, pgocaml
+, camlzip, pgocaml
 }:
 
 let mkpath = p: n:
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
 
   buildInputs = [ocaml which findlib ocaml_react ocaml_ssl lwt
   ocamlnet ocaml_pcre cryptokit tyxml ipaddr zlib libev openssl
-  ocaml_sqlite3 tree uutf makeWrapper camlp4 pgocaml ];
+  ocaml_sqlite3 tree uutf makeWrapper camlp4 pgocaml camlzip ];
 
   configureFlags = "--root $(out) --prefix /";