I have a problem when installing npm modules. NodeJS is installed on Ubuntu 11.10 running on Virtual Box on Windows host. My project files are on NTFS partition (I have to share
Try this - http://ahtik.com/blog/2012/08/16/fixing-your-virtualbox-shared-folder-symlink-error/
Works for me!
Basically you set a parameter
VBoxManage setextradata YOURVMNAME VBoxInternal2/SharedFoldersEnableSymlinksCreate/YOURSHAREFOLDERNAME 1
And then run the VM as an administrator....