diff --git a/lib/blockchain.js b/lib/blockchain.js
index 32fe06e59..7e060ce53 100644
--- a/lib/blockchain.js
+++ b/lib/blockchain.js
@@ -2,6 +2,7 @@ var mkdirp = require('mkdirp');
 var wrench = require('wrench');
 var colors = require('colors');
 var GethCommands = require('./geth_commands.js');
+var path = require('path');
 
 var Blockchain = function(blockchainConfig, Client) {
   this.blockchainConfig = blockchainConfig;
@@ -54,7 +55,7 @@ Blockchain.prototype.initChainAndGetAddress = function() {
   mkdirp.sync(this.datadir);
 
   // copy mining script
-  wrench.copyDirSyncRecursive(__dirname + "/../js", ".embark/development/js", {forceDelete: true});
+  wrench.copyDirSyncRecursive(path.join(__dirname, "/../js"), ".embark/development/js", {forceDelete: true});
 
   // check if an account already exists, create one if not, return address
   result = this.runCommand(this.client.listAccountsCommand());