Themeing Error for ionsix-theme

.txt

edxapp@precise64:~/edx-platform$ paver update_assets lms --settings=aws
mkdir_p path('/edx/app/edxapp/themes/default/static/css')
---> pavelib.assets.update_assets
---> pavelib.prereqs.install_ruby_prereqs
Ruby prereqs unchanged, skipping...
---> pavelib.prereqs.install_node_prereqs
Node prereqs unchanged, skipping...
python manage.py lms --settings=aws preprocess_assets lms/static/sass/*.scss lms/static/themed_sass
2016-01-09 14:41:33,157 INFO 13366 [dd.dogapi] dog_stats_api.py:66 - Initializing dog api to use statsd: localhost, 8125
System check identified some issues:

WARNINGS:
wiki.ArticleRevision.ip_address: (fields.W900) IPAddressField has been deprecated. Support for it (except in historical migrations) will be removed in Django 1.9.
	HINT: Use GenericIPAddressField instead.
		Finished preprocessing lms assets.
xmodule_assets common/static/xmodule
		Finished processing xmodule assets.
---> pavelib.assets.compile_coffeescript
node_modules/.bin/coffee --compile `find /edx/app/edxapp/edx-platform/lms /edx/app/edxapp/edx-platform/cms /edx/app/edxapp/edx-platform/common /edx/app/edxapp/themes/default -type f -name "*.coffee"`
---> pavelib.assets.compile_sass
sass --update --cache-location /tmp/sass-cache --default-encoding utf-8 --style compressed --quiet --load-path . --load-path common/static --load-path common/static/sass --load-path lms/static/sass --load-path lms/static/themed_sass --load-path cms/static/sass --load-path common/static/sass --load-path lms/static/certificates/sass --load-path /edx/app/edxapp/themes/default/static/sass lms/static/sass:lms/static/css lms/static/themed_sass:lms/static/css cms/static/sass:cms/static/css common/static/sass:common/static/css lms/static/certificates/sass:lms/static/certificates/css /edx/app/edxapp/themes/default/static/sass:/edx/app/edxapp/themes/default/static/css


Captured Task Output:
---------------------

---> pavelib.assets.update_assets
---> pavelib.prereqs.install_ruby_prereqs
---> pavelib.prereqs.install_node_prereqs
python manage.py lms --settings=aws preprocess_assets lms/static/sass/*.scss lms/static/themed_sass
xmodule_assets common/static/xmodule
---> pavelib.assets.compile_coffeescript
node_modules/.bin/coffee --compile `find /edx/app/edxapp/edx-platform/lms /edx/app/edxapp/edx-platform/cms /edx/app/edxapp/edx-platform/common /edx/app/edxapp/themes/default -type f -name "*.coffee"`
---> pavelib.assets.compile_sass
sass --update --cache-location /tmp/sass-cache --default-encoding utf-8 --style compressed --quiet --load-path . --load-path common/static --load-path common/static/sass --load-path lms/static/sass --load-path lms/static/themed_sass --load-path cms/static/sass --load-path common/static/sass --load-path lms/static/certificates/sass --load-path /edx/app/edxapp/themes/default/static/sass lms/static/sass:lms/static/css lms/static/themed_sass:lms/static/css cms/static/sass:cms/static/css common/static/sass:common/static/css lms/static/certificates/sass:lms/static/certificates/css /edx/app/edxapp/themes/default/static/sass:/edx/app/edxapp/themes/default/static/css

Build failed running pavelib.assets.update_assets: Subprocess return code: 1