build/ path broken in Windows development environment

I am trying to setup up command for development. When I run `npm install` followed by `npm run dev` I get the following error message shown in the `npm-debug.log` file.

```
0 info it worked if it ends with ok
1 verbose cli [ 'C:\\Program Files\\nodejs\\\\node.exe',
1 verbose cli 'C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js',
1 verbose cli 'run',
1 verbose cli 'dev' ]
2 info using npm@1.4.28
3 info using node@v0.10.35
4 verbose node symlink C:\Program Files\nodejs\\node.exe
5 verbose run-script [ 'predev', 'dev', 'postdev' ]
6 info predev Command@1.0.0
7 info dev Command@1.0.0
8 verbose unsafe-perm in lifecycle true
9 info Command@1.0.0 Failed to exec dev script
10 error Command@1.0.0 dev: `NODE_ENV=development ./node_modules/.bin/babel-node ./dev-env/dev.js`
10 error Exit status 1
11 error Failed at the Command@1.0.0 dev script.
11 error This is most likely a problem with the Command package,
11 error not with npm itself.
11 error Tell the author that this fails on your system:
11 error NODE_ENV=development ./node_modules/.bin/babel-node ./dev-env/dev.js
11 error You can get their info via:
11 error npm owner ls Command
11 error There is likely additional logging output above.
12 error System Windows_NT 6.1.7601
13 error command "C:\\Program Files\\nodejs\\\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "run" "dev"
14 error cwd C:\Users\%username%\Documents\Github\slash-command
15 error node -v v0.10.35
16 error npm -v 1.4.28
17 error code ELIFECYCLE
18 verbose exit [ 1, true ]
```