Add Nix files for obtaining all C/C++ dependencies

default.nix

@@ -0,0 +1,22 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+let
+  stdenv = pkgs.stdenv;
+
+in
+
+stdenv.mkDerivation rec {
+  name = "nimbus-${version}";
+  version = "0.0.1";
+
+  meta = with stdenv.lib; {
+    description = "An Ethereum 2.0 Sharding Client for Resource-Restricted Devices";
+    homepage = https://github.com/status-im/nimbus;
+    license = [licenses.asl20];
+    platforms = platforms.unix;
+  };
+
+  src = ./.;
+  buildInputs = [pkgs.clang pkgs.nim pkgs.rocksdb pkgs.secp256k1 pkgs.cryptopp];
+}
+

devenv.nix

@@ -0,0 +1,10 @@
+let
+  pkgs = import (builtins.fetchGit {
+     url = git://github.com/NixOS/nixpkgs;
+     rev = "8c6f9223d02c5123cbd364d6d56caca3c81416f0";
+  }) {};
+
+in
+
+import ./default.nix { inherit pkgs; }
+