diff --git a/.dockerignore b/.dockerignore
index c3cd88b04..49311a465 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -6,6 +6,8 @@ tezos-node
 tezos-protocol-compiler
 tezos-client
 
+scripts/opam-test-all.sh.DONE
+
 **/.merlin
 
 **/*~
diff --git a/.gitignore b/.gitignore
index ee7bb0e84..e4be9c97d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,8 @@
 /tezos-protocol-compiler
 /tezos-client
 
+/scripts/opam-test-all.sh.DONE
+
 .merlin
 
 *~
diff --git a/bin_client/tezos-client.opam b/bin_client/tezos-client.opam
index 428d8be2e..21eff4929 100644
--- a/bin_client/tezos-client.opam
+++ b/bin_client/tezos-client.opam
@@ -10,6 +10,9 @@ depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
   "tezos-base"
+  "tezos-embedded-client-genesis"
+  "tezos-embedded-client-alpha"
+  "tezos-client-base"
 ]
 build: [
   [ "jbuilder" "build" "-p" name "-j" jobs ]
diff --git a/bin_node/jbuild b/bin_node/jbuild
index fda2095ab..fd9ab64ae 100644
--- a/bin_node/jbuild
+++ b/bin_node/jbuild
@@ -12,7 +12,8 @@
               tezos-embedded-protocol-genesis
               tezos-embedded-protocol-demo
               tezos-embedded-protocol-alpha
-              cmdliner))
+              cmdliner
+              ssl))
   (flags (:standard -w -9+27-30-32-40@8
                     -safe-string
                     -open Tezos_base__TzPervasives
diff --git a/bin_node/tezos-node.opam b/bin_node/tezos-node.opam
index 604c6a661..9799a9509 100644
--- a/bin_node/tezos-node.opam
+++ b/bin_node/tezos-node.opam
@@ -14,6 +14,7 @@ depends: [
   "tezos-embedded-protocol-demo"
   "tezos-embedded-protocol-alpha"
   "cmdliner"
+  "ssl"
 ]
 build: [
   [ "jbuilder" "build" "-p" name "-j" jobs ]
diff --git a/lib_base/tezos-base.opam b/lib_base/tezos-base.opam
index 523511e2f..36283ce7a 100644
--- a/lib_base/tezos-base.opam
+++ b/lib_base/tezos-base.opam
@@ -9,14 +9,14 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
   "tezos-stdlib"
   "tezos-stdlib-lwt"
   "tezos-crypto"
   "tezos-data-encoding"
   "tezos-error-monad"
-  "ezjsonm"
+  "ezjsonm" { >= "0.5.0" }
   "calendar"
+  "mtime" { >= "1.0.0" }
 ]
 build: [
   [ "jbuilder" "build" "-p" name "-j" jobs ]
diff --git a/lib_client_base/client_rpcs.ml b/lib_client_base/client_rpcs.ml
index f231b1365..08baf728a 100644
--- a/lib_client_base/client_rpcs.ml
+++ b/lib_client_base/client_rpcs.ml
@@ -201,7 +201,7 @@ class type rpc_sig = object
     RPC.meth ->
     string list ->
     Data_encoding.json ->
-    ('a * Cohttp.Code.status_code * Cohttp_lwt_body.t)
+    ('a * Cohttp.Code.status_code * Cohttp_lwt.Body.t)
       Error_monad.tzresult Lwt.t
   method parse_answer :
     (unit, 'b, 'c, 'd) RPC.service ->
@@ -220,7 +220,7 @@ class rpc config = object (self)
     RPC.meth ->
     string list ->
     Data_encoding.json ->
-    (a * Cohttp.Code.status_code * Cohttp_lwt_body.t)
+    (a * Cohttp.Code.status_code * Cohttp_lwt.Body.t)
       Error_monad.tzresult Lwt.t =
     fun log_request meth service json ->
       let scheme = if config.tls then "https" else "http" in
@@ -229,7 +229,7 @@ class rpc config = object (self)
         Uri.make ~scheme ~host:config.host ~port:config.port ~path () in
       let reqbody = Data_encoding_ezjsonm.to_string json in
       Lwt.catch begin fun () ->
-        let body = Cohttp_lwt_body.of_string reqbody in
+        let body = Cohttp_lwt.Body.of_string reqbody in
         Cohttp_lwt_unix.Client.call
           (meth :> Cohttp.Code.meth) ~body uri >>= fun (code, ansbody) ->
         log_request uri json >>= fun reqid ->
@@ -249,7 +249,7 @@ class rpc config = object (self)
       meth service json >>=? fun (reqid, code, ansbody) ->
     match code with
     | #Cohttp.Code.success_status ->
-        let ansbody = Cohttp_lwt_body.to_stream ansbody in
+        let ansbody = Cohttp_lwt.Body.to_stream ansbody in
         let json_st = Data_encoding_ezjsonm.from_stream ansbody in
         let parsed_st, push = Lwt_stream.create () in
         let rec loop () =
@@ -271,7 +271,7 @@ class rpc config = object (self)
         Lwt.async loop ;
         return parsed_st
     | err ->
-        Cohttp_lwt_body.to_string ansbody >>= fun ansbody ->
+        Cohttp_lwt.Body.to_string ansbody >>= fun ansbody ->
         logger.log_error reqid code ansbody >>= fun () ->
         fail config (Request_failed (service, err))
 
@@ -293,7 +293,7 @@ class rpc config = object (self)
       let Logger logger = config.logger in
       self#make_request logger.log_request
         meth service json >>=? fun (reqid, code, ansbody) ->
-      Cohttp_lwt_body.to_string ansbody >>= fun ansbody ->
+      Cohttp_lwt.Body.to_string ansbody >>= fun ansbody ->
       match code with
       | #Cohttp.Code.success_status -> begin
           if ansbody = "" then
@@ -331,7 +331,7 @@ let make_request config log_request meth service json =
     Uri.make ~scheme ~host:config.host ~port:config.port ~path () in
   let reqbody = Data_encoding_ezjsonm.to_string json in
   Lwt.catch begin fun () ->
-    let body = Cohttp_lwt_body.of_string reqbody in
+    let body = Cohttp_lwt.Body.of_string reqbody in
     Cohttp_lwt_unix.Client.call
       (meth :> Cohttp.Code.meth)
       ~body uri >>= fun (code, ansbody) ->
diff --git a/lib_client_base/client_rpcs.mli b/lib_client_base/client_rpcs.mli
index 9854dc7dc..9cb706904 100644
--- a/lib_client_base/client_rpcs.mli
+++ b/lib_client_base/client_rpcs.mli
@@ -39,7 +39,7 @@ class type rpc_sig = object
     RPC.meth ->
     string list ->
     Data_encoding.json ->
-    ('a * Cohttp.Code.status_code * Cohttp_lwt_body.t)
+    ('a * Cohttp.Code.status_code * Cohttp_lwt.Body.t)
       Error_monad.tzresult Lwt.t
   method parse_answer :
     (unit, 'b, 'c, 'd) RPC.service ->
diff --git a/lib_crypto/tezos-crypto.opam b/lib_crypto/tezos-crypto.opam
index 1d07a98c8..1f6188483 100644
--- a/lib_crypto/tezos-crypto.opam
+++ b/lib_crypto/tezos-crypto.opam
@@ -9,9 +9,13 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
-  "tezos-base"
-  "lwt"
+  "tezos-stdlib"
+  "tezos-stdlib-lwt"
+  "tezos-data-encoding"
+  "tezos-error-monad"
+  "nocrypto"
+  "sodium"
+  "zarith"
 ]
 build: [
   [ "jbuilder" "build" "-p" name "-j" jobs ]
diff --git a/lib_data_encoding/tezos-data-encoding.opam b/lib_data_encoding/tezos-data-encoding.opam
index d6ad27dad..daa18e7e8 100644
--- a/lib_data_encoding/tezos-data-encoding.opam
+++ b/lib_data_encoding/tezos-data-encoding.opam
@@ -9,7 +9,6 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
   "tezos-stdlib"
   "ocplib-json-typed"
   "ocplib-endian"
diff --git a/lib_embedded_client_alpha/tezos-embedded-client-alpha.opam b/lib_embedded_client_alpha/tezos-embedded-client-alpha.opam
index b22c69c8f..5d0008261 100644
--- a/lib_embedded_client_alpha/tezos-embedded-client-alpha.opam
+++ b/lib_embedded_client_alpha/tezos-embedded-client-alpha.opam
@@ -11,7 +11,7 @@ depends: [
   "jbuilder" { build & >= "1.0+beta15" }
   "tezos-base"
   "tezos-embedded-protocol-alpha"
-  "tezos-embedded-protocol-alpha.raw"
+  "tezos-node-services"
   "tezos-client-base"
 ]
 build: [
diff --git a/lib_embedded_client_genesis/tezos-embedded-client-genesis.opam b/lib_embedded_client_genesis/tezos-embedded-client-genesis.opam
index 01acb9746..f19a57bae 100644
--- a/lib_embedded_client_genesis/tezos-embedded-client-genesis.opam
+++ b/lib_embedded_client_genesis/tezos-embedded-client-genesis.opam
@@ -11,9 +11,8 @@ depends: [
   "jbuilder" { build & >= "1.0+beta15" }
   "tezos-base"
   "tezos-embedded-protocol-genesis"
-  "tezos-embedded-protocol-genesis.raw"
-  "tezos-embedded-protocol-alpha.environment"
-  "tezos-embedded-protocol-alpha.raw"
+  "tezos-embedded-protocol-alpha"
+  "tezos-node-services"
   "tezos-client-base"
 ]
 build: [
diff --git a/lib_embedded_protocol_alpha/tezos-embedded-protocol-alpha.opam b/lib_embedded_protocol_alpha/tezos-embedded-protocol-alpha.opam
index b844cddf0..bf7535387 100644
--- a/lib_embedded_protocol_alpha/tezos-embedded-protocol-alpha.opam
+++ b/lib_embedded_protocol_alpha/tezos-embedded-protocol-alpha.opam
@@ -9,11 +9,14 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
-  "tezos-base"
-  "uutf"
+  "tezos-protocol-compiler"
+  "tezos-node-updater"
+  "tezos-node-shell"
 ]
 build: [
+  [ "rm" "jbuild" "src/jbuild" ]
+  [ "cp" "%{tezos-protocol-compiler:share}%/jbuild_embedded_protocol_template" "src/jbuild" ]
+  [ "sed" "-i" "s/let predefined_version = None/let predefined_version = Some \"alpha\"/" "src/jbuild" ]
   [ "jbuilder" "build" "-p" name "-j" jobs ]
 ]
 build-test: [
diff --git a/lib_embedded_protocol_alpha/tezos-protocol-alpha.opam b/lib_embedded_protocol_alpha/tezos-protocol-alpha.opam
index b844cddf0..4690d4245 100644
--- a/lib_embedded_protocol_alpha/tezos-protocol-alpha.opam
+++ b/lib_embedded_protocol_alpha/tezos-protocol-alpha.opam
@@ -9,11 +9,12 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
-  "tezos-base"
-  "uutf"
+  "tezos-protocol-compiler"
 ]
 build: [
+  [ "rm" "jbuild" "src/jbuild" ]
+  [ "cp" "%{tezos-protocol-compiler:share}%/jbuild_protocol_template" "jbuild" ]
+  [ "sed" "-i" "s/let predefined_version = None/let predefined_version = Some \"alpha\"/" "jbuild" ]
   [ "jbuilder" "build" "-p" name "-j" jobs ]
 ]
 build-test: [
diff --git a/lib_embedded_protocol_demo/tezos-embedded-protocol-demo.opam b/lib_embedded_protocol_demo/tezos-embedded-protocol-demo.opam
index b844cddf0..938be65f2 100644
--- a/lib_embedded_protocol_demo/tezos-embedded-protocol-demo.opam
+++ b/lib_embedded_protocol_demo/tezos-embedded-protocol-demo.opam
@@ -9,11 +9,14 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
-  "tezos-base"
-  "uutf"
+  "tezos-protocol-compiler"
+  "tezos-node-updater"
+  "tezos-node-shell"
 ]
 build: [
+  [ "rm" "jbuild" "src/jbuild" ]
+  [ "cp" "%{tezos-protocol-compiler:share}%/jbuild_embedded_protocol_template" "src/jbuild" ]
+  [ "sed" "-i" "s/let predefined_version = None/let predefined_version = Some \"demo\"/" "src/jbuild" ]
   [ "jbuilder" "build" "-p" name "-j" jobs ]
 ]
 build-test: [
diff --git a/lib_embedded_protocol_demo/tezos-protocol-demo.opam b/lib_embedded_protocol_demo/tezos-protocol-demo.opam
index b844cddf0..c64513cb5 100644
--- a/lib_embedded_protocol_demo/tezos-protocol-demo.opam
+++ b/lib_embedded_protocol_demo/tezos-protocol-demo.opam
@@ -9,11 +9,12 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
-  "tezos-base"
-  "uutf"
+  "tezos-protocol-compiler"
 ]
 build: [
+  [ "rm" "jbuild" "src/jbuild" ]
+  [ "cp" "%{tezos-protocol-compiler:share}%/jbuild_protocol_template" "jbuild" ]
+  [ "sed" "-i" "s/let predefined_version = None/let predefined_version = Some \"demo\"/" "jbuild" ]
   [ "jbuilder" "build" "-p" name "-j" jobs ]
 ]
 build-test: [
diff --git a/lib_embedded_protocol_genesis/tezos-embedded-protocol-genesis.opam b/lib_embedded_protocol_genesis/tezos-embedded-protocol-genesis.opam
index b844cddf0..cab1bdd0d 100644
--- a/lib_embedded_protocol_genesis/tezos-embedded-protocol-genesis.opam
+++ b/lib_embedded_protocol_genesis/tezos-embedded-protocol-genesis.opam
@@ -9,11 +9,14 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
-  "tezos-base"
-  "uutf"
+  "tezos-protocol-compiler"
+  "tezos-node-updater"
+  "tezos-node-shell"
 ]
 build: [
+  [ "rm" "jbuild" "src/jbuild" ]
+  [ "cp" "%{tezos-protocol-compiler:share}%/jbuild_embedded_protocol_template" "src/jbuild" ]
+  [ "sed" "-i" "s/let predefined_version = None/let predefined_version = Some \"genesis\"/" "src/jbuild" ]
   [ "jbuilder" "build" "-p" name "-j" jobs ]
 ]
 build-test: [
diff --git a/lib_embedded_protocol_genesis/tezos-protocol-genesis.opam b/lib_embedded_protocol_genesis/tezos-protocol-genesis.opam
index b844cddf0..dd69d9488 100644
--- a/lib_embedded_protocol_genesis/tezos-protocol-genesis.opam
+++ b/lib_embedded_protocol_genesis/tezos-protocol-genesis.opam
@@ -9,11 +9,12 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
-  "tezos-base"
-  "uutf"
+  "tezos-protocol-compiler"
 ]
 build: [
+  [ "rm" "jbuild" "src/jbuild" ]
+  [ "cp" "%{tezos-protocol-compiler:share}%/jbuild_protocol_template" "jbuild" ]
+  [ "sed" "-i" "s/let predefined_version = None/let predefined_version = Some \"genesis\"/" "jbuild" ]
   [ "jbuilder" "build" "-p" name "-j" jobs ]
 ]
 build-test: [
diff --git a/lib_error_monad/tezos-error-monad.opam b/lib_error_monad/tezos-error-monad.opam
index cf1548716..5092caea1 100644
--- a/lib_error_monad/tezos-error-monad.opam
+++ b/lib_error_monad/tezos-error-monad.opam
@@ -9,9 +9,9 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
   "tezos-stdlib"
   "tezos-data-encoding"
+  "lwt"
 ]
 build: [
   [ "jbuilder" "build" "-p" name "-j" jobs ]
diff --git a/lib_micheline/tezos-micheline.opam b/lib_micheline/tezos-micheline.opam
index b844cddf0..a0a1c65de 100644
--- a/lib_micheline/tezos-micheline.opam
+++ b/lib_micheline/tezos-micheline.opam
@@ -9,7 +9,6 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
   "tezos-base"
   "uutf"
 ]
diff --git a/lib_node_http/tezos-node-http.opam b/lib_node_http/tezos-node-http.opam
index 679f3f4c2..ffcde779f 100644
--- a/lib_node_http/tezos-node-http.opam
+++ b/lib_node_http/tezos-node-http.opam
@@ -9,8 +9,9 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
-  "mtime.clock.os"
+  "tezos-base"
+  "tezos-node-services"
+  "ocplib-resto-directory"
   "ocplib-resto-cohttp"
 ]
 build: [
diff --git a/lib_node_p2p/tezos-node-p2p.opam b/lib_node_p2p/tezos-node-p2p.opam
index 679f3f4c2..d67e36e02 100644
--- a/lib_node_p2p/tezos-node-p2p.opam
+++ b/lib_node_p2p/tezos-node-p2p.opam
@@ -9,9 +9,8 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
-  "mtime.clock.os"
-  "ocplib-resto-cohttp"
+  "tezos-base"
+  "tezos-node-p2p-base"
 ]
 build: [
   [ "jbuilder" "build" "-p" name "-j" jobs ]
diff --git a/lib_node_p2p_base/tezos-node-p2p-base.opam b/lib_node_p2p_base/tezos-node-p2p-base.opam
index 679f3f4c2..428d8be2e 100644
--- a/lib_node_p2p_base/tezos-node-p2p-base.opam
+++ b/lib_node_p2p_base/tezos-node-p2p-base.opam
@@ -9,9 +9,7 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
-  "mtime.clock.os"
-  "ocplib-resto-cohttp"
+  "tezos-base"
 ]
 build: [
   [ "jbuilder" "build" "-p" name "-j" jobs ]
diff --git a/lib_node_services/tezos-node-services.opam b/lib_node_services/tezos-node-services.opam
index 679f3f4c2..f489679cd 100644
--- a/lib_node_services/tezos-node-services.opam
+++ b/lib_node_services/tezos-node-services.opam
@@ -9,9 +9,9 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
-  "mtime.clock.os"
-  "ocplib-resto-cohttp"
+  "tezos-base"
+  "tezos-node-p2p-base"
+  "ocplib-resto"
 ]
 build: [
   [ "jbuilder" "build" "-p" name "-j" jobs ]
diff --git a/lib_node_shell/tezos-node-shell.opam b/lib_node_shell/tezos-node-shell.opam
index 4b3273593..28b78fbea 100644
--- a/lib_node_shell/tezos-node-shell.opam
+++ b/lib_node_shell/tezos-node-shell.opam
@@ -9,12 +9,12 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
   "tezos-base"
-  "tezos-micheline"
-  "tezos-protocol-compiler"
-  "tezos-node-net"
-  "tezos-node-db"
+  "tezos-storage"
+  "tezos-node-services"
+  "tezos-node-p2p-base"
+  "tezos-node-p2p"
+  "tezos-node-updater"
 ]
 build: [
   [ "jbuilder" "build" "-p" name "-j" jobs ]
diff --git a/lib_node_updater/tezos-node-updater.opam b/lib_node_updater/tezos-node-updater.opam
index b844cddf0..e51631f08 100644
--- a/lib_node_updater/tezos-node-updater.opam
+++ b/lib_node_updater/tezos-node-updater.opam
@@ -9,9 +9,13 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
   "tezos-base"
-  "uutf"
+  "tezos-micheline"
+  "tezos-protocol-compiler"
+  "tezos-storage"
+  "tezos-node-services"
+  "tezos-node-p2p-base"
+  "tezos-node-http"
 ]
 build: [
   [ "jbuilder" "build" "-p" name "-j" jobs ]
diff --git a/lib_protocol_compiler/jbuild_embedded_protocol_template b/lib_protocol_compiler/jbuild_embedded_protocol_template
index 5726b2807..9ce7c7587 100644
--- a/lib_protocol_compiler/jbuild_embedded_protocol_template
+++ b/lib_protocol_compiler/jbuild_embedded_protocol_template
@@ -3,12 +3,17 @@
 let prefix = "lib_embedded_protocol_"
 let dirname = Filename.basename @@ Filename.dirname @@ Sys.getcwd ()
 
+let predefined_version = None (* to be substituted in opam packages *)
+
 let version =
-  let x = String.length prefix in
-  let n = String.length dirname in
-  if not (n >= x && String.sub dirname 0 x = prefix) then
-    failwith "unexpected directory name" ;
-  String.sub dirname x (n - x)
+  match predefined_version with
+  | Some version -> version
+  | None ->
+    let x = String.length prefix in
+    let n = String.length dirname in
+    if not (n >= x && String.sub dirname 0 x = prefix) then
+      failwith "unexpected directory name" ;
+    String.sub dirname x (n - x)
 
 let () = Format.kasprintf Jbuild_plugin.V1.send {|
 (jbuild_version 1)
diff --git a/lib_protocol_compiler/jbuild_protocol_template b/lib_protocol_compiler/jbuild_protocol_template
index 238bb686e..f700fa2ff 100644
--- a/lib_protocol_compiler/jbuild_protocol_template
+++ b/lib_protocol_compiler/jbuild_protocol_template
@@ -12,12 +12,22 @@
 let prefix = "lib_embedded_protocol_"
 let dirname = Filename.basename @@ Sys.getcwd ()
 
+let predefined_version = None (* to be substituted in opam packages *)
+
 let version =
-  let x = String.length prefix in
-  let n = String.length dirname in
-  if not (n >= x && String.sub dirname 0 x = prefix) then
-    failwith "unexpected directory name" ;
-  String.sub dirname x (n - x)
+  match predefined_version with
+  | Some version -> version
+  | None ->
+    let x = String.length prefix in
+    let n = String.length dirname in
+    if not (n >= x && String.sub dirname 0 x = prefix) then
+      failwith "unexpected directory name" ;
+    String.sub dirname x (n - x)
+
+let path =
+  match predefined_version with
+  | None -> "lib_embedded_protocol_" ^ version
+  | Some _ -> "."
 
 let () = Format.kasprintf Jbuild_plugin.V1.send {|
 
@@ -38,8 +48,7 @@ let () = Format.kasprintf Jbuild_plugin.V1.send {|
 (library
  ((name tezos_protocol_%s)
   (public_name tezos-protocol-%s)
-  (library_flags (:standard -linkall
-                            lib_embedded_protocol_%s/tezos_protocol_%s.cmx))
+  (library_flags (:standard -linkall %s/tezos_protocol_%s.cmx))
   (wrapped false)
   (modes (native))
   (modules (Tezos_protocol_%s_dummy))))
@@ -55,4 +64,5 @@ let () = Format.kasprintf Jbuild_plugin.V1.send {|
 
 |}
     version version version version version version version version
-    version version version version
+    path
+    version version version
diff --git a/lib_protocol_compiler/tezos-protocol-compiler.opam b/lib_protocol_compiler/tezos-protocol-compiler.opam
index 9954d902c..77530f471 100644
--- a/lib_protocol_compiler/tezos-protocol-compiler.opam
+++ b/lib_protocol_compiler/tezos-protocol-compiler.opam
@@ -9,14 +9,12 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
+  "base-unix"
   "tezos-base"
   "tezos-protocol-environment-sigs"
-  "compiler-libs"
-  "compiler-libs.optcomp"
-  "lwt.unix"
+  "lwt"
   "ocplib-endian"
-  "ocplib-ocamlres"
-  "unix"
+  "ocp-ocamlres" { >= "dev" }
 ]
 build: [
   [ "jbuilder" "build" "-p" name "-j" jobs ]
diff --git a/lib_stdlib/tezos-stdlib.opam b/lib_stdlib/tezos-stdlib.opam
index a5fc48f5d..b910895be 100644
--- a/lib_stdlib/tezos-stdlib.opam
+++ b/lib_stdlib/tezos-stdlib.opam
@@ -9,9 +9,8 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
   "cstruct"
-  "ocplib-endian.bigstring"
+  "ocplib-endian"
   "stringext"
 ]
 build: [
diff --git a/lib_stdlib_lwt/tezos-stdlib-lwt.opam b/lib_stdlib_lwt/tezos-stdlib-lwt.opam
index c92cc1f11..103c21587 100644
--- a/lib_stdlib_lwt/tezos-stdlib-lwt.opam
+++ b/lib_stdlib_lwt/tezos-stdlib-lwt.opam
@@ -9,12 +9,11 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
   "tezos-stdlib"
   "tezos-data-encoding"
   "tezos-error-monad"
-  "lwt.unix"
-  "ipaddr.unix"
+  "lwt" { >= "3.0.0" }
+  "ipaddr"
 ]
 build: [
   [ "jbuilder" "build" "-p" name "-j" jobs ]
diff --git a/lib_storage/tezos-storage.opam b/lib_storage/tezos-storage.opam
index e6ba786e9..5badb9f90 100644
--- a/lib_storage/tezos-storage.opam
+++ b/lib_storage/tezos-storage.opam
@@ -9,10 +9,9 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & >= "1.0+beta15" }
-  "base-bigarray"
   "tezos-base"
   "leveldb"
-  "irmin-unix"
+  "irmin-leveldb"
 ]
 build: [
   [ "jbuilder" "build" "-p" name "-j" jobs ]
diff --git a/scripts/opam-pin.sh b/scripts/opam-pin.sh
new file mode 100755
index 000000000..095707440
--- /dev/null
+++ b/scripts/opam-pin.sh
@@ -0,0 +1,21 @@
+#! /bin/sh
+
+set -e
+
+script_dir="$(cd "$(dirname "$0")" && echo "$(pwd -P)/")"
+src_dir="$(dirname "$script_dir")"
+
+opams=$(find "$src_dir" -name tezos-deps.opam -prune -or -name \*.opam -print)
+
+export OPAMYES=yes
+
+packages=
+for opam in $opams; do
+    dir=$(dirname $opam)
+    file=$(basename $opam)
+    package=${file%.opam}
+    packages="$packages $package"
+    opam pin add --no-action $package $dir
+done
+
+packages=$(opam list --short --all --sort $packages)
diff --git a/scripts/opam-remove.sh b/scripts/opam-remove.sh
new file mode 100755
index 000000000..5fb847e5c
--- /dev/null
+++ b/scripts/opam-remove.sh
@@ -0,0 +1,20 @@
+#! /bin/sh
+
+set -e
+
+script_dir="$(cd "$(dirname "$0")" && echo "$(pwd -P)/")"
+src_dir="$(dirname "$script_dir")"
+
+opams=$(find "$src_dir" -name \*.opam)
+packages=
+
+for opam in $opams; do
+    dir=$(dirname $opam)
+    file=$(basename $opam)
+    package=${file%.opam}
+    packages="$packages $package"
+done
+
+installed=$(opam list --short --installed $packages)
+
+opam remove $installed
diff --git a/scripts/opam-test-all.sh b/scripts/opam-test-all.sh
new file mode 100755
index 000000000..812db7b6a
--- /dev/null
+++ b/scripts/opam-test-all.sh
@@ -0,0 +1,74 @@
+#! /bin/sh
+
+set -e
+
+script_dir="$(cd "$(dirname "$0")" && echo "$(pwd -P)/")"
+src_dir="$(dirname "$script_dir")"
+cd "$src_dir"
+
+cleanup () {
+    set +e
+    if [ -f LOG ]; then
+        echo "failed."
+        echo
+        cat LOG
+        rm LOG
+        echo
+        exit 1
+    fi
+}
+trap cleanup EXIT INT
+
+silent () {
+    "$@" > LOG 2>&1
+    rm LOG
+}
+
+requested_packages="$@"
+
+export OPAMYES=yes
+
+echo -n "Cleanup state and pin packages..."
+silent ./scripts/opam-unpin.sh
+silent . ./scripts/opam-pin.sh
+echo " OK."
+
+if ! [ -z "$requested_packages" ]; then
+    packages="$requested_packages"
+fi
+
+okfile="$0.DONE"
+touch $okfile
+ok=$(cat "$okfile")
+
+ignore() {
+    for i in $ok; do
+        if [ $i = $1 ]; then return 0; fi
+    done
+    return 1
+}
+
+for package in $packages; do
+
+    if ignore $package; then
+        echo "Ignoring: $package."
+        continue
+    fi
+
+    echo -n "Installing: $package..."
+    silent opam install $package
+    echo " OK."
+
+    echo -n "Removing: $package..."
+    silent opam remove -a $package
+    echo " OK."
+
+    echo $package >> "$okfile"
+
+done
+
+echo
+echo "Successfully installed the following packages: "
+echo
+cat $okfile | sed 's/^/- /'
+rm $okfile
diff --git a/scripts/opam-unpin.sh b/scripts/opam-unpin.sh
new file mode 100755
index 000000000..5cf38ae5d
--- /dev/null
+++ b/scripts/opam-unpin.sh
@@ -0,0 +1,11 @@
+#! /bin/sh
+
+set -e
+
+script_dir="$(cd "$(dirname "$0")" && echo "$(pwd -P)/")"
+src_dir="$(dirname "$script_dir")"
+
+. "$script_dir"/opam-remove.sh
+
+opam pin remove $packages
+
diff --git a/scripts/opam-upgrade.sh b/scripts/opam-upgrade.sh
new file mode 100755
index 000000000..a2fee61bc
--- /dev/null
+++ b/scripts/opam-upgrade.sh
@@ -0,0 +1,35 @@
+#! /bin/sh
+
+set -e
+
+script_dir="$(cd "$(dirname "$0")" && echo "$(pwd -P)/")"
+src_dir="$(dirname "$script_dir")"
+cd "$src_dir"
+
+cleanup () {
+    set +e
+    if [ -f LOG ]; then
+        echo "Failure"
+        echo
+        cat LOG
+        echo
+        exit 1
+    fi
+}
+trap cleanup EXIT INT
+
+silent () {
+    "$@" > LOG 2>&1
+    rm LOG
+}
+
+echo "Updating package description..."
+silent . ./scripts/opam-pin.sh
+
+upgradables=$(opam list --short --installed $packages)
+
+if [ -z "$upgradables" ]; then
+    echo "No previously installed package. Nothing to do."
+    exit 1
+fi
+opam upgrade $upgradables
diff --git a/tezos-deps.opam b/tezos-deps.opam
index b4c7c5182..689af690e 100644
--- a/tezos-deps.opam
+++ b/tezos-deps.opam
@@ -13,13 +13,10 @@ depends: [
   "base-threads"
   "conf-libev"
   "calendar"
-  "cohttp" { >= "0.21" }
+  "cohttp" { >= "1.0.0" }
   "conduit"
   "ezjsonm" { >= "0.5.0" }
-  "git"
-  "git-unix"
   "irmin" { >= "1.3" }
-  "irmin-unix" { >= "1.3" }
   "lwt" { >= "3.0.0" }
   "lwt_ssl"
   "menhir"
diff --git a/vendors/irmin-leveldb/irmin-leveldb.opam b/vendors/irmin-leveldb/irmin-leveldb.opam
index cdc7dcba0..fc93132c8 100644
--- a/vendors/irmin-leveldb/irmin-leveldb.opam
+++ b/vendors/irmin-leveldb/irmin-leveldb.opam
@@ -15,7 +15,7 @@ build-test: ["jbuilder" "runtest" "-p" name]
 
 depends: [
   "jbuilder" {build & >= "1.0+beta10"}
-  "irmin"    {>= "1.2.0"}
+  "irmin"    {>= "1.3.0"}
   "leveldb"  {>= "1.1.1"}
 ]
 
diff --git a/vendors/irmin-leveldb/jbuild b/vendors/irmin-leveldb/jbuild
index 21ff70af7..d95212f9f 100644
--- a/vendors/irmin-leveldb/jbuild
+++ b/vendors/irmin-leveldb/jbuild
@@ -3,4 +3,4 @@
 (library
  ((name        irmin_leveldb)
   (public_name irmin-leveldb)
-  (libraries   (irmin leveldb git))))
+  (libraries   (irmin leveldb))))
diff --git a/vendors/ocplib-resto/lib_ezresto-directory/ocplib-ezresto-directory.opam b/vendors/ocplib-resto/lib_ezresto-directory/ocplib-ezresto-directory.opam
index 0bc7a4d14..ef8abfe46 100644
--- a/vendors/ocplib-resto/lib_ezresto-directory/ocplib-ezresto-directory.opam
+++ b/vendors/ocplib-resto/lib_ezresto-directory/ocplib-ezresto-directory.opam
@@ -19,6 +19,6 @@ build-test: [
 depends: [
   "ocamlfind" {build}
   "jbuilder" {build}
-  "ocplib-ezresto"
-  "ocplib-resto-directory"
+  "ocplib-ezresto" {= "dev" }
+  "ocplib-resto-directory" {= "dev" }
 ]
diff --git a/vendors/ocplib-resto/lib_ezresto/ocplib-ezresto.opam b/vendors/ocplib-resto/lib_ezresto/ocplib-ezresto.opam
index df3363239..9d562bbfb 100644
--- a/vendors/ocplib-resto/lib_ezresto/ocplib-ezresto.opam
+++ b/vendors/ocplib-resto/lib_ezresto/ocplib-ezresto.opam
@@ -19,6 +19,6 @@ build-test: [
 depends: [
   "ocamlfind" {build}
   "jbuilder" {build}
-  "ocplib-resto"
-  "ocplib-resto-json"
+  "ocplib-resto" {= "dev" }
+  "ocplib-resto-json" {= "dev" }
 ]
diff --git a/vendors/ocplib-resto/lib_resto-cohttp/ocplib-resto-cohttp.opam b/vendors/ocplib-resto/lib_resto-cohttp/ocplib-resto-cohttp.opam
index 468fd19c4..ccf0976bf 100644
--- a/vendors/ocplib-resto/lib_resto-cohttp/ocplib-resto-cohttp.opam
+++ b/vendors/ocplib-resto/lib_resto-cohttp/ocplib-resto-cohttp.opam
@@ -19,6 +19,6 @@ build-test: [
 depends: [
   "ocamlfind" {build}
   "jbuilder" {build}
-  "ocplib-resto-directory"
-  "cohttp-lwt-unix"
+  "ocplib-resto-directory" {= "dev" }
+  "cohttp-lwt-unix" { >= "1.0.0" }
 ]
diff --git a/vendors/ocplib-resto/lib_resto-cohttp/restoCohttp.ml b/vendors/ocplib-resto/lib_resto-cohttp/restoCohttp.ml
index 77ff47497..401cef493 100644
--- a/vendors/ocplib-resto/lib_resto-cohttp/restoCohttp.ml
+++ b/vendors/ocplib-resto/lib_resto-cohttp/restoCohttp.ml
@@ -215,10 +215,10 @@ module Make (Encoding : Resto.ENCODING)(Log : LOGGING) = struct
           end >>=? fun query ->
           let output = output_media_type.construct s.types.output
           and error = function
-            | None -> Cohttp_lwt_body.empty, Transfer.Fixed 0L
+            | None -> Cohttp_lwt.Body.empty, Transfer.Fixed 0L
             | Some e ->
                 let s = output_media_type.construct s.types.error e in
-                Cohttp_lwt_body.of_string s,
+                Cohttp_lwt.Body.of_string s,
                 Transfer.Fixed (Int64.of_int (String.length s)) in
           let headers = Header.init () in
           let headers =
@@ -228,7 +228,7 @@ module Make (Encoding : Resto.ENCODING)(Log : LOGGING) = struct
             | Service.No_input ->
                 s.handler query () >>= Lwt.return_ok
             | Service.Input input ->
-                Cohttp_lwt_body.to_string body >>= fun body ->
+                Cohttp_lwt.Body.to_string body >>= fun body ->
                 match
                   input_media_type.destruct input body
                 with
@@ -243,13 +243,13 @@ module Make (Encoding : Resto.ENCODING)(Log : LOGGING) = struct
                 Transfer.Fixed (Int64.of_int (String.length body)) in
               Lwt.return_ok
                 (Response.make ~status:`OK ~encoding ~headers (),
-                 Cohttp_lwt_body.of_string body)
+                 Cohttp_lwt.Body.of_string body)
           | `OkStream o ->
               let body = create_stream server con output o in
               let encoding = Transfer.Chunked in
               Lwt.return_ok
                 (Response.make ~status:`OK ~encoding ~headers (),
-                 Cohttp_lwt_body.of_stream body)
+                 Cohttp_lwt.Body.of_stream body)
           | `Created s ->
               let headers = Header.init () in
               let headers =
@@ -258,11 +258,11 @@ module Make (Encoding : Resto.ENCODING)(Log : LOGGING) = struct
                 | Some s -> Header.add headers "location" s in
               Lwt.return_ok
                 (Response.make ~status:`Created  ~headers (),
-                 Cohttp_lwt_body.empty)
+                 Cohttp_lwt.Body.empty)
           | `No_content ->
               Lwt.return_ok
                 (Response.make ~status:`No_content (),
-                 Cohttp_lwt_body.empty)
+                 Cohttp_lwt.Body.empty)
           | `Unauthorized e ->
               let body, encoding = error e in
               let status = `Unauthorized in
@@ -322,7 +322,7 @@ module Make (Encoding : Resto.ENCODING)(Log : LOGGING) = struct
           let headers = Cors.add_headers headers server.cors origin_header in
           Lwt.return_ok
             (Response.make ~flush:true ~status:`OK ~headers (),
-             Cohttp_lwt_body.empty)
+             Cohttp_lwt.Body.empty)
       | _ ->
           Lwt.return_error `Not_implemented
     end >>= function
@@ -330,7 +330,7 @@ module Make (Encoding : Resto.ENCODING)(Log : LOGGING) = struct
     | Error `Not_implemented ->
         Lwt.return
           (Response.make ~status:`Not_implemented (),
-           Cohttp_lwt_body.empty)
+           Cohttp_lwt.Body.empty)
     | Error `Method_not_allowed methods ->
         let headers = Header.init () in
         let headers =
@@ -338,14 +338,14 @@ module Make (Encoding : Resto.ENCODING)(Log : LOGGING) = struct
             (List.map Resto.string_of_meth methods) in
         Lwt.return
           (Response.make ~status:`Method_not_allowed ~headers (),
-           Cohttp_lwt_body.empty)
+           Cohttp_lwt.Body.empty)
     | Error `Cannot_parse_path (context, arg, value) ->
         let headers = Header.init () in
         let headers =
           Header.add headers "content-type" "text/plain" in
         Lwt.return
           (Response.make ~status:`Bad_request ~headers (),
-           Format.kasprintf Cohttp_lwt_body.of_string
+           Format.kasprintf Cohttp_lwt.Body.of_string
              "Failed to parsed an argument in path. After \"%s\", \
               the value \"%s\" is not acceptable for type \"%s\""
              (String.concat "/" context) value arg.name)
@@ -355,7 +355,7 @@ module Make (Encoding : Resto.ENCODING)(Log : LOGGING) = struct
           Header.add headers "content-type" "text/plain" in
         Lwt.return
           (Response.make ~status:`Bad_request ~headers (),
-           Format.kasprintf Cohttp_lwt_body.of_string
+           Format.kasprintf Cohttp_lwt.Body.of_string
              "Failed to parse the request body: %s" s)
     | Error `Cannot_parse_query s ->
         let headers = Header.init () in
@@ -363,7 +363,7 @@ module Make (Encoding : Resto.ENCODING)(Log : LOGGING) = struct
           Header.add headers "content-type" "text/plain" in
         Lwt.return
           (Response.make ~status:`Bad_request ~headers (),
-           Format.kasprintf Cohttp_lwt_body.of_string
+           Format.kasprintf Cohttp_lwt.Body.of_string
              "Failed to parse the query string: %s" s)
     | Error `Not_acceptable ->
         let accepted_encoding =
@@ -372,15 +372,15 @@ module Make (Encoding : Resto.ENCODING)(Log : LOGGING) = struct
                server.media_types) in
         Lwt.return
           (Response.make ~status:`Not_acceptable (),
-           Cohttp_lwt_body.of_string accepted_encoding)
+           Cohttp_lwt.Body.of_string accepted_encoding)
     | Error `Unsupported_media_type _ ->
         Lwt.return
           (Response.make ~status:`Unsupported_media_type (),
-           Cohttp_lwt_body.empty)
+           Cohttp_lwt.Body.empty)
     | Error `Not_found ->
         Lwt.return
           (Response.make ~status:`Not_found (),
-           Cohttp_lwt_body.empty)
+           Cohttp_lwt.Body.empty)
 
   (* Promise a running RPC server. *)
 
@@ -402,9 +402,8 @@ module Make (Encoding : Resto.ENCODING)(Log : LOGGING) = struct
       stopper ;
       worker = Lwt.return_unit ;
     } in
-    let open Cohttp_lwt_unix in
     Conduit_lwt_unix.init ~src:host () >>= fun ctx ->
-    let ctx = Cohttp_lwt_unix_net.init ~ctx () in
+    let ctx = Cohttp_lwt_unix.Net.init ~ctx () in
     server.worker <- begin
       let conn_closed (_, con) =
         log_info "connection closed %s" (Connection.to_string con) ;
@@ -426,12 +425,12 @@ module Make (Encoding : Resto.ENCODING)(Log : LOGGING) = struct
             let headers =
               Header.add headers "content-type" "text/ocaml.exception" in
             let status = `Internal_server_error in
-            let body = Cohttp_lwt_body.of_string (Printexc.to_string exn) in
+            let body = Cohttp_lwt.Body.of_string (Printexc.to_string exn) in
             Lwt.return (Response.make ~status ~headers (), body)
           end
       in
-      Server.create ~stop ~ctx ~mode ~on_exn
-        (Server.make ~callback ~conn_closed ())
+      Cohttp_lwt_unix.Server.create ~stop ~ctx ~mode ~on_exn
+        (Cohttp_lwt_unix.Server.make ~callback ~conn_closed ())
     end ;
     Lwt.return server
 
diff --git a/vendors/ocplib-resto/lib_resto-json/ocplib-resto-json.opam b/vendors/ocplib-resto/lib_resto-json/ocplib-resto-json.opam
index 88b510d1e..0caea88d3 100644
--- a/vendors/ocplib-resto/lib_resto-json/ocplib-resto-json.opam
+++ b/vendors/ocplib-resto/lib_resto-json/ocplib-resto-json.opam
@@ -19,6 +19,7 @@ build-test: [
 depends: [
   "ocamlfind" {build}
   "jbuilder" {build}
-  "ocplib-resto"
+  "ocplib-resto" {= "dev" }
   "ocplib-json-typed" { >= "0.4" }
+  "ocplib-endian" ## for `ocplib-json-typed.bson` to be built
 ]