Sass --watch breaking after Yosemite update

Question

After updating to Yosemite on my Macbook Pro, sass --watch no longer functions. I get the following:

>>> Sass is watching for changes. Press Ctrl-C to stop.
Ignoring bigdecimal-1.2.5 because its extensions are not built.  Try: gem pristine bigdecimal-1.2.5
Ignoring ffi-1.9.5 because its extensions are not built.  Try: gem pristine ffi-1.9.5
Ignoring ffi-1.9.3 because its extensions are not built.  Try: gem pristine ffi-1.9.3
Ignoring json-1.8.1 because its extensions are not built.  Try: gem pristine json-1.8.1
Ignoring libxml-ruby-2.7.0 because its extensions are not built.  Try: gem pristine libxml-ruby-2.7.0
Ignoring nokogiri-1.6.3.1 because its extensions are not built.  Try: gem pristine nokogiri-1.6.3.1
Ignoring psych-2.0.6 because its extensions are not built.  Try: gem pristine psych-2.0.6

"gem pristine" doesn't do anything. I tried on Sass 3.4.5 and 3.4.6. Unsure how to resolve.

Answer 1

Iv'e encountered the same issue, this next command helped me, try typing 'gem pristine --all', no idea what it does but it fixed everything.