You would have a following warning message while you are trying to watch for changes with Sass.
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WARNING: Listen has fallen back to polling, learn more at https://github.com/guard/listen#fallback.
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In this case, run following command at first.
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> gem install listen
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Then, if you still have a warning message like as follows,
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[Listen warning]:
Missing dependency 'rb-inotify' (version '~> 0.8.8')!
Please run the following to satisfy the dependency:
gem install --version '~> 0.8.8' rb-inotify
For a better performance, it's recommended that you satisfy the missing dependency.
Listen will be polling changes. Learn more at https://github.com/guard/listen#polling-fallback.
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Run following command (It depends on the message).
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gem install rb-inotify
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