diff --git a/src/proto_genesis/lib_client/client_proto_main.ml b/src/proto_genesis/lib_client/client_proto_main.ml
index c854c6340..9924187ac 100644
--- a/src/proto_genesis/lib_client/client_proto_main.ml
+++ b/src/proto_genesis/lib_client/client_proto_main.ml
@@ -56,6 +56,18 @@ let file_parameter =
       else
         return p)
 
+let fitness_from_int64 fitness =
+  (* definition taken from src/proto_alpha/lib_protocol/src/constants_repr.ml *)
+  let version_number = "\000" in
+  (* definitions taken from src/proto_alpha/lib_protocol/src/fitness_repr.ml *)
+  let int64_to_bytes i =
+    let b = MBytes.create 8 in
+    MBytes.set_int64 b 0 i;
+    b
+  in
+  [ MBytes.of_string version_number ;
+    int64_to_bytes fitness ]
+
 let commands () =
   let open Clic in
   let args =
@@ -87,7 +99,7 @@ let commands () =
          file_parameter
        @@ stop)
       begin fun timestamp hash fitness sk param_json_file (cctxt : Client_context.full) ->
-        let fitness = Proto_alpha.Fitness_repr.from_int64 fitness in
+        let fitness = fitness_from_int64 fitness in
         Tezos_stdlib_unix.Lwt_utils_unix.Json.read_file param_json_file >>=? fun json ->
         let protocol_parameters = Data_encoding.Binary.to_bytes_exn Data_encoding.json json in
         bake cctxt ?timestamp cctxt#block
diff --git a/src/proto_genesis/lib_client/dune b/src/proto_genesis/lib_client/dune
index 7ed212465..fd23c5039 100644
--- a/src/proto_genesis/lib_client/dune
+++ b/src/proto_genesis/lib_client/dune
@@ -6,8 +6,7 @@
             tezos-client-base
             tezos-client-commands
             tezos-protocol-environment
-            tezos-protocol-genesis
-            tezos-protocol-alpha)
+            tezos-protocol-genesis)
  (library_flags (:standard -linkall))
  (flags (:standard -w -9+27-30-32-40@8
                    -safe-string
diff --git a/src/proto_genesis/lib_client/proto_alpha.ml b/src/proto_genesis/lib_client/proto_alpha.ml
deleted file mode 100644
index ac9ab8485..000000000
--- a/src/proto_genesis/lib_client/proto_alpha.ml
+++ /dev/null
@@ -1,28 +0,0 @@
-(*****************************************************************************)
-(*                                                                           *)
-(* Open Source License                                                       *)
-(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com>     *)
-(*                                                                           *)
-(* Permission is hereby granted, free of charge, to any person obtaining a   *)
-(* copy of this software and associated documentation files (the "Software"),*)
-(* to deal in the Software without restriction, including without limitation *)
-(* the rights to use, copy, modify, merge, publish, distribute, sublicense,  *)
-(* and/or sell copies of the Software, and to permit persons to whom the     *)
-(* Software is furnished to do so, subject to the following conditions:      *)
-(*                                                                           *)
-(* The above copyright notice and this permission notice shall be included   *)
-(* in all copies or substantial portions of the Software.                    *)
-(*                                                                           *)
-(* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR*)
-(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  *)
-(* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL   *)
-(* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER*)
-(* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING   *)
-(* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER       *)
-(* DEALINGS IN THE SOFTWARE.                                                 *)
-(*                                                                           *)
-(*****************************************************************************)
-
-module Name = struct let name = "genesis-alpha" end
-module Alpha_environment = Tezos_protocol_environment_faked.MakeV1(Name)()
-include Tezos_protocol_alpha.Functor.Make(Alpha_environment)
diff --git a/src/proto_genesis/lib_client/tezos-client-genesis.opam b/src/proto_genesis/lib_client/tezos-client-genesis.opam
index 733703bd4..a7b8c64ce 100644
--- a/src/proto_genesis/lib_client/tezos-client-genesis.opam
+++ b/src/proto_genesis/lib_client/tezos-client-genesis.opam
@@ -15,7 +15,6 @@ depends: [
   "tezos-client-commands"
   "tezos-protocol-environment"
   "tezos-protocol-genesis"
-  "tezos-protocol-alpha"
 ]
 build: [
   [ "dune" "build" "-p" name "-j" jobs ]