diff --git a/nix/blob.nix b/nix/blob.nix
new file mode 100644
--- /dev/null
+++ b/nix/blob.nix
@@ -0,0 +1,34 @@
+{ stdenv
+, lib
+, rustPlatform
+, fetchFromGitHub
+, protobuf_3_15_cmake
+, darwin
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "blob";
+  version = "0.0.1";
+
+  src = ../services/blob;
+
+  cargoLock.lockFile = ../services/blob/Cargo.lock;
+
+  prePatch = ''
+    mkdir ../../shared
+    cp -r ${../shared/protos} ../../shared/protos
+  '';
+
+  nativeBuildInputs = [
+    protobuf_3_15_cmake
+  ];
+
+  buildInputs = lib.optionals stdenv.isDarwin [
+    darwin.apple_sdk.frameworks.Security
+    darwin.libiconv
+  ];
+
+  meta = with lib; {
+    license = licenses.bsd3;
+  };
+}
diff --git a/nix/overlay.nix b/nix/overlay.nix
--- a/nix/overlay.nix
+++ b/nix/overlay.nix
@@ -49,6 +49,8 @@
     nativeBuildInputs = (o.nativeBuildInputs or []) ++ [ prev.cmake ];
   });
 
+  comm-blob = final.callPackage ./blob.nix { };
+
   protobuf_3_15_cmake = prev.callPackage ./protobuf_3_15.nix { };
 
   devShells.default = final.callPackage ./dev-shell.nix { };