"dependencies": {
"devkit": "git+ssh://git@github.com:gameclosure/devkit.git#cda5161d3e62ba42434c5a4cd342dea7ede6803d"
}
Will fail because npm prepublish is not run (devkit serve then fails because the static files are not built).
https://github.com/gameclosure/devkit/blob/1cb572d7ed31cdfccabeb5c4d48c9b68a1cde6c7/package.json#L40
Since all of the gulp dependencies are devDependencies, you can not easily fix as an end user. Please make it so that devkit can be used as a dependency over git.