diff --git a/nix/default.nix b/nix/default.nix
index 8e284fbc..dbb04e49 100644
--- a/nix/default.nix
+++ b/nix/default.nix
@@ -3,5 +3,8 @@
   config.android_sdk.accept_license = true;
 } }:
 
-#pkgs.callPackage ./mobile_pkg.nix { }
-pkgs.callPackage ./mobile_mod.nix { }
+{
+  pkg = pkgs.callPackage ./mobile_pkg.nix { };
+  mod = pkgs.callPackage ./mobile_mod.nix { };
+  bkp = pkgs.callPackage ./mobile_bkp.nix { };
+}
diff --git a/nix/mobile_mod.nix b/nix/mobile_mod.nix
index 37441a8c..48a106d0 100644
--- a/nix/mobile_mod.nix
+++ b/nix/mobile_mod.nix
@@ -1,4 +1,4 @@
-{ pkgs, buildGoModule }:
+{ pkgs, buildGo119Module }:
 
 let
   androidPkgs = pkgs.androidenv.composeAndroidPackages {
@@ -8,13 +8,13 @@ let
   };
   androidSdk = androidPkgs.androidsdk;
   #gomobile = pkgs.gomobile.override { inherit androidPkgs; };
-in buildGoModule {
+in buildGo119Module {
   pname = "go-waku";
   version = "devel";
   goPkgPath = "github.com/status-im/go-waku";
-  vendorSha256 = "sha256-+W5PnVmD4oPh3a8Ik9Xn3inCI8shqEsdlkG/d6PQntk=";
+  vendorSha256 = "sha256-tNBIxJv9Vty83UQ31XWzXicRVcEAIs30eyA3RBQz9nw=";
   doCheck = false;
-  proxyVendor = true;
+  #proxyVendor = true;
 
   src = ./..;
 
@@ -22,6 +22,7 @@ in buildGoModule {
 
   ANDROID_HOME = "${androidSdk}/libexec/android-sdk";
   #GOFLAGS = "-mod=mod";
+  #GO111MODULE = "on";
 
   #overrideModAttrs = (_: {
   #  postBuild = ''
@@ -34,19 +35,37 @@ in buildGoModule {
   # Correct GOPATH necessary to avoid error:
   # `no exported names in the package "_/build/go-waku/mobile"`
   postConfigure = ''
+    echo "$GOPATH"
     cd "$NIX_BUILD_TOP"
     mkdir -p "go/src/$(dirname "$goPkgPath")"
     mv "$sourceRoot" "go/src/$goPkgPath"
-    cd go/src/$goPkgPath/mobile
+    cd go/src/$goPkgPath
   '';
 
+  preBuild = ''
+    echo '-----------------------------------------------'
+    find -L vendor | grep go-ethereum
+    echo '-----------------------------------------------'
+    find -L vendor | grep prometheus
+    echo '-----------------------------------------------'
+    ls -l vendor/contrib.go.opencensus.io/exporter/prometheus
+    echo '-----------------------------------------------'
+    ls -l vendor/contrib.go.opencensus.io/exporter/prometheus/@v
+    echo '-----------------------------------------------'
+    ls -l vendor/contrib.go.opencensus.io/exporter/prometheus/@v/list
+    echo '-----------------------------------------------'
+  '';
   buildPhase = ''
-    GO111MODULE=off gomobile bind -x \
+    runHook preBuild
+
+    gomobile bind -x -v \
       -target=android/arm64 \
       -androidapi=23 \
       -ldflags="-s -w" \
       -o go-waku.aar \
       ./mobile
+
+    runHook postBuild
   '';
 
   installPhase = ''
diff --git a/nix/mobile_pkg.nix b/nix/mobile_pkg.nix
index aeeb6bdd..72a313b4 100644
--- a/nix/mobile_pkg.nix
+++ b/nix/mobile_pkg.nix
@@ -1,4 +1,4 @@
-{ lib, pkgs, callPackage, buildGoModule, buildGoPackage }:
+{ lib, pkgs, callPackage, buildGo119Package }:
 
 let
   androidPkgs = pkgs.androidenv.composeAndroidPackages {
@@ -8,7 +8,7 @@ let
   };
   androidSdk = androidPkgs.androidsdk;
   gomobile = pkgs.gomobile.override { inherit androidPkgs; };
-in buildGoPackage rec {
+in buildGo119Package rec {
   pname = "go-waku";
   version = "devel";
   goPackagePath = "github.com/status-im/go-waku";