Install jspm-local using npm into your global or local repository.
npm install -g jspm-local
# or locally
npm install jspm-local --save-dev
Register a new endpoint for jspm.
jspm registry create local jspm-local
Install <YourProject> as a local dependecy.
jspm install local:<YourProject>
Jspm-local will search for a folder named <YourProject> next to current folder. This is eqal to ../<YourProject>/package.json