This is nightly npm builds repository for blinksocks. You can install one of them via:
$ npm install -g https://github.com/blinksocks/blinksocks-nightly-releases/raw/master/v<version>-<date>-<commit_hash>.tgz
Or just download first then install locally:
$ npm install -g v2.9.1-20180209154413-6437235.tgz