diff --git a/src/lib_protocol_compiler/compiler.ml b/src/lib_protocol_compiler/compiler.ml
index b16e99e22..a305752ab 100644
--- a/src/lib_protocol_compiler/compiler.ml
+++ b/src/lib_protocol_compiler/compiler.ml
@@ -171,7 +171,7 @@ let main { compile_ml ; pack_objects ; link_shared } =
   (* Generate the 'functor' *)
   let functor_file = build_dir // "functor.ml" in
   let oc = open_out functor_file in
-  Packer.dump oc
+  Packer.dump oc hash
     (Array.map
        begin fun { Protocol.name }  ->
          let name_lowercase = String.uncapitalize_ascii name in
diff --git a/src/lib_protocol_compiler/main_packer.ml b/src/lib_protocol_compiler/main_packer.ml
index 16315e5fc..e60577183 100644
--- a/src/lib_protocol_compiler/main_packer.ml
+++ b/src/lib_protocol_compiler/main_packer.ml
@@ -20,14 +20,14 @@ let () =
     match List.rev !anonymous with
     | [ source_dir ] -> source_dir
     | _ -> Arg.usage args_spec usage_msg ; Pervasives.exit 1 in
-  let _hash, protocol =
+  let hash, protocol =
     match Lwt_main.run (Lwt_utils_unix.Protocol.read_dir source_dir) with
     | Ok v -> v
     | Error err ->
         Format.kasprintf Pervasives.failwith
           "Failed to read TEZOS_PROTOCOL: %a" pp_print_error err in
   (* Generate the 'functor' *)
-  Packer.dump stdout
+  Packer.dump stdout hash
     (Array.map
        begin fun { Protocol.name ; _ }  ->
          let name_lowercase = String.uncapitalize_ascii name in
diff --git a/src/lib_protocol_compiler/packer.ml b/src/lib_protocol_compiler/packer.ml
index 918b112de..ba270a8f9 100644
--- a/src/lib_protocol_compiler/packer.ml
+++ b/src/lib_protocol_compiler/packer.ml
@@ -46,12 +46,14 @@ let opened_modules = [
   "Logging" ;
 ]
 
-let dump oc files =
+let dump oc hash files =
   Printf.fprintf oc
     "module Make (Tezos_protocol_environment : Tezos_protocol_environment_sigs__V1.T) = struct\n" ;
   Printf.fprintf oc "[@@@ocaml.warning \"-33\"]\n" ;
   List.iter (Printf.fprintf oc "open %s\n") opened_modules ;
   Printf.fprintf oc "[@@@ocaml.warning \"+33\"]\n" ;
+  Printf.fprintf oc "let hash = Protocol_hash.of_b58check_exn %S;;\n"
+    (Protocol_hash.to_b58check hash) ;
   for i = 0 to Array.length files - 1 do
     include_ml oc files.(i) ;
   done ;
@@ -60,6 +62,3 @@ let dump oc files =
        (Filename.basename
           (Filename.chop_extension files.(Array.length files - 1)))) ;
   Printf.fprintf oc "end\n%!"
-
-let main () =
-  dump stdout (Array.sub Sys.argv 1 (Array.length Sys.argv - 2))
diff --git a/src/lib_protocol_compiler/packer.mli b/src/lib_protocol_compiler/packer.mli
index a318cfe34..afa540e72 100644
--- a/src/lib_protocol_compiler/packer.mli
+++ b/src/lib_protocol_compiler/packer.mli
@@ -7,6 +7,4 @@
 (*                                                                        *)
 (**************************************************************************)
 
-val dump: out_channel -> string array -> unit
-
-val main: unit -> unit
+val dump: out_channel -> Protocol_hash.t -> string array -> unit
diff --git a/src/proto_alpha/lib_client/proto_alpha.ml b/src/proto_alpha/lib_client/proto_alpha.ml
index 0aa7b6686..443a02ab9 100644
--- a/src/proto_alpha/lib_client/proto_alpha.ml
+++ b/src/proto_alpha/lib_client/proto_alpha.ml
@@ -11,10 +11,6 @@ module Name = struct let name = "alpha" end
 module Alpha_environment = Tezos_protocol_environment_faked.MakeV1(Name)()
 include Tezos_protocol_alpha.Functor.Make(Alpha_environment)
 
-let hash =
-  Protocol_hash.of_b58check_exn
-    "ProtoALphaALphaALphaALphaALphaALphaALphaALphaDdp3zK"
-
 class type rpc_context = object
   inherit RPC_context.json
   inherit [Block_services.block] Alpha_environment.RPC_context.simple