Meteor upgrading 1.2 to 1.4

Hi everyone,

I have an app running Meteor 1.2.1 blaze and Telescope Legacy 0.20.

I am wondering what is the best way for me to update to meteor 1.4 react and telescope nova.
I have been trying to update running meteor update but i keep getting an error on accounts-password package.

And i tired commenting out that package.
I successfully updated meteor to 1.3.5.2

but when i ran meteor start i get this error

Changes to your project’s package version selections:

standard-minifiers removed from your project

=> Errors prevented startup:

While minifying app stylesheet:
path.js:313:15: Arguments to path.resolve must be strings
at Object.exports.resolve (path.js:313:15)
at Object.exports.relative (path.js:371:18)
at pathRelative (:448:30)
at :407:31
at Array.forEach (native)
at Function..each..forEach (:139:11)
at :365:7
at Array.forEach (native)
at Function..each..forEach (:139:11)
at rewriteRules (:342:5)
at Object.CssTools.rewriteCssUrls (:328:5)
at :298:16
at Array.forEach (native)
at Function..each..forEach (:139:11)
at Object.CssTools.mergeCssAsts (:275:7)
at :92:31
at CssToolsMinifier.processFilesForBundle (:30:16)

Wondering if anyone encounter this before?

Thanks,
Kelvin