I tried to install gulp version 4 alpha 3 by using:
sudo npm install gulpjs/gulp#v4.0.0-alpha.3 -g
And got the following errors:
npm ERR! Command failed: /usr/bin/git clone --depth=1 -q -b 4.0 git://github.com/gulpjs/gulp.git /Users/admin/.npm/_cacache/tmp/git-clone-4a9cf932 npm ERR! /Users/admin/.npm/_cacache/tmp/git-clone-4a9cf932/.git: Permission denied
I've cleaned npm cache several times and it still didn't work.
When I tried sudo npm install gulp@next -g or npm install -g , the respective versions can be installed properly.
Is there any difference for installation prerequisites among gulp3.9, gulp4.0 and gulp4.0 alpha ?