1 files changed, 7 insertions, 2 deletions
diff --git a/pkgs/development/ocaml-modules/piqi/default.nix b/pkgs/development/ocaml-modules/piqi/default.nix
index 273cd8f1862c..f8126f91d876 100644
--- a/pkgs/development/ocaml-modules/piqi/default.nix
+++ b/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;