piqi: missed propagated dependency

pkgs/development/ocaml-modules/piqi-ocaml/default.nix

@@ -1,4 +1,4 @@
-{stdenv, fetchurl, ocaml, findlib, piqi, ulex, easy-format, xmlm, base64, camlp4}:
+{ stdenv, fetchurl, ocaml, findlib, piqi, ulex, easy-format, xmlm, camlp4 }:
 
 stdenv.mkDerivation rec {
   version = "0.7.5";
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "0ngz6y8i98i5v2ma8nk6mc83pdsmf2z0ks7m3xi6clfg3zqbddrv";
   };
 
-  buildInputs = [ocaml findlib piqi base64 camlp4];
+  buildInputs = [ ocaml findlib piqi camlp4 ];
 
   createFindlibDestdir = true;
 

pkgs/development/ocaml-modules/piqi/default.nix

@@ -9,13 +9,18 @@ stdenv.mkDerivation rec {
     sha256 = "1whqr2bb3gds2zmrzqnv8vqka9928w4lx6mi6g244kmbwb2h8d8l";
   };
 
-  buildInputs = [ocaml findlib camlp4 which ocaml_optcomp base64];
-  propagatedBuildInputs = [ulex xmlm easy-format];
+  buildInputs = [ocaml findlib camlp4 which ocaml_optcomp];
+  propagatedBuildInputs = [ulex xmlm easy-format base64];
 
   patches = [ ./no-ocamlpath-override.patch ];
 
   createFindlibDestdir = true;
 
+  buildPhase = ''
+    make
+    make -C piqilib piqilib.cma
+  '';
+
   installPhase = ''
     make install;
     make ocaml-install;