Trying to build for a chrome extension produces a non utf-8 encoded js file

I am trying to use Meteor to build a chrome extension and i’m using meteor-build-client. the output of this build process produces a minified js file that chrome will not accept because it’s not UTF-8 encoded.

has anybody else had this problem? is there something I’m doing wrong? I would really appreciate any help.

It seems that meteor by default encodes the output of it’s build process as an iso 8859-2 file? is there a way to prevent this? is this just part of the toolchain meteor uses?