Running "uncss_inline:dist" (uncss_inline) task hangs on mac OS Sierra

[stephenscott]

this hangs after fresh repo clone and setup and then attempting to run grunt build

[stephenscott]

mac OS Sierra 10.12
$ node -v
v6.7.0
$ npm -v
3.10.7
$git clone https://github.com/sparanoid/almace-scaffolding.git
$bundle install && npm install
$grunt build
..
Running "uncss_inline:dist" (uncss_inline) task

then hangs forever...

[stephenscott]

$ grunt --version
grunt-cli v1.2.0
grunt v1.0.1

[stephenscott]

$ grunt -v

.....
Loading "uncss-inline.js" tasks...OK

• uncss_inline

Running "uncss_inline" task

Running "uncss_inline:dist" (uncss_inline) task
Verifying property uncss_inline.dist exists in config...OK
Files: _site/about/index.html -> _site/about/index.html
Files: _site/alanvega.html -> _site/alanvega.html
Files: _site/archive/index.html -> _site/archive/index.html
...
...
Files: _site/vinyl-painting.html -> _site/vinyl-painting.html
Files: _site/white-soul-moments.html -> _site/white-soul-moments.html
Files: _site/you-choose.html -> _site/you-choose.html
Options: report="min"
Reading _site/about/index.html...OK

[then it hangs]