Does anyone have this problem below too? Today i’m try update Meteor to new version 1.5.2.1.
Then i can’t start my app with some error blelow 
=> Started proxy.
=> Started MongoDB.
=> Errors prevented startup:
While loading plugin `compileLessBatch` from package `less`:
packages/meteor.js:663:31: path.join is not a function
at packages/meteor.js:663:31
at packages/meteor.js:846:4
at packages/meteor.js:1380:3
While loading plugin `compileTemplatesBatch` from package `templating-compiler`:
packages/meteor.js:673:31: path.join is not a function
at packages/meteor.js:673:31
at packages/meteor.js:858:4
at packages/meteor.js:1393:3
=> Your application has errors. Waiting for file change.
Below is content inside .meteor/pacakges
meteor-base@1.1.0
mongo@1.2.2
blaze-html-templates
reactive-var@1.0.11
jquery@1.11.10
tracker@1.1.3
standard-minifier-css@1.3.5
standard-minifier-js@2.1.2
ecmascript@0.8.2
shell-server@0.2.4
ostrio:templatehelpers
ostrio:files
dynamic-import@0.1.3
kadira:flow-router
kadira:blaze-layout
accounts-password@1.4.0
juliancwirko:s-alert
juliancwirko:s-alert-stackslide
twbs:bootstrap
less@2.7.9
tsega:bootstrap3-datetimepicker
http@1.2.12
session@1.1.7
todda00:friendly-slugs
alanning:roles
asad:push
# giordanocardillo:browser-notifications
oaf:html5-desktop-notifications
juliancwirko:s-alert-scale
juliancwirko:s-alert-slide
juliancwirko:s-alert-genie
juliancwirko:s-alert-jelly
juliancwirko:s-alert-flip
juliancwirko:s-alert-bouncyflip
matdutour:popup-confirm
momentjs:moment
arillo:flow-router-helpers
email@1.2.3
Thank you for your help.
phuonghx