シンボリックリンク作れない時に出るエラー

gistfile1.txt

npm ERR! Linux 3.13.0-71-generic
npm ERR! argv "/home/vagrant/.nodebrew/node/v4.2.3/bin/node" "/home/vagrant/.nodebrew/current/bin/npm" "install" "jade@1.11.0"
npm ERR! node v4.2.3
npm ERR! npm  v3.5.3
npm ERR! path ../acorn/bin/acorn
npm ERR! code EPROTO
npm ERR! errno -71
npm ERR! syscall symlink

npm ERR! EPROTO: protocol error, symlink '../acorn/bin/acorn' -> '/home/vagrant/workspace/node-js-http-3015/node_modules/.bin/acorn'
npm ERR! 
npm ERR! If you need help, you may report this error at:
npm ERR!     <https://github.com/npm/npm/issues>
npm ERR! Linux 3.13.0-71-generic
npm ERR! argv "/home/vagrant/.nodebrew/node/v4.2.3/bin/node" "/home/vagrant/.nodebrew/current/bin/npm" "install" "jade@1.11.0"
npm ERR! node v4.2.3
npm ERR! npm  v3.5.3
npm ERR! path npm-debug.log.1109522696
npm ERR! code ETXTBSY
npm ERR! errno -26
npm ERR! syscall rename

npm ERR! ETXTBSY: text file is busy, rename 'npm-debug.log.1109522696' -> 'npm-debug.log'
npm ERR! 
npm ERR! If you need help, you may report this error at:
npm ERR!     <https://github.com/npm/npm/issues>

npm ERR! Please include the following file with any support request:
npm ERR!     /home/vagrant/workspace/node-js-http-3015/npm-debug.log
npm ERR! code 1
vagrant@vagrant-ubuntu-trusty-64:~/workspace/node-js-http-3015$ ^C