Tests failed and was rebuilt from source

$ npm install node-sass

> node-sass@0.8.4 install /vagrant/app/node_modules/node-sass
> node build.js

`linux-x64-v8-3.14` exists; testing
make: Entering directory `/vagrant/app/node_modules/node-sass/build'
make: Warning: File `binding.target.mk' has modification time 85 s in the future
  CXX(target) Release/obj.target/binding/binding.o
  CXX(target) Release/obj.target/binding/sass_context_wrapper.o
  CXX(target) Release/obj.target/binding/libsass/ast.o
  CXX(target) Release/obj.target/binding/libsass/base64vlq.o
  CXX(target) Release/obj.target/binding/libsass/bind.o
  CXX(target) Release/obj.target/binding/libsass/constants.o
  CXX(target) Release/obj.target/binding/libsass/context.o
  CXX(target) Release/obj.target/binding/libsass/contextualize.o
  CXX(target) Release/obj.target/binding/libsass/copy_c_str.o
  CXX(target) Release/obj.target/binding/libsass/error_handling.o
  CXX(target) Release/obj.target/binding/libsass/eval.o
  CXX(target) Release/obj.target/binding/libsass/expand.o
  CXX(target) Release/obj.target/binding/libsass/extend.o
  CXX(target) Release/obj.target/binding/libsass/file.o
  CXX(target) Release/obj.target/binding/libsass/functions.o
../libsass/functions.cpp: In function 'Sass::Expression* Sass::Functions::nth(Sass::Env&, Sass::Context&, const char*, const std::string&, Sass::Position, Sass::Backtrace*)':
../libsass/functions.cpp:801: warning: comparison of unsigned expression < 0 is always false
  CXX(target) Release/obj.target/binding/libsass/inspect.o
  CXX(target) Release/obj.target/binding/libsass/output_compressed.o
  CXX(target) Release/obj.target/binding/libsass/output_nested.o
  CXX(target) Release/obj.target/binding/libsass/parser.o
  CXX(target) Release/obj.target/binding/libsass/prelexer.o
  CXX(target) Release/obj.target/binding/libsass/sass.o
  CXX(target) Release/obj.target/binding/libsass/sass_interface.o
  CXX(target) Release/obj.target/binding/libsass/source_map.o
  CXX(target) Release/obj.target/binding/libsass/to_c.o
  CXX(target) Release/obj.target/binding/libsass/to_string.o
  CXX(target) Release/obj.target/binding/libsass/units.o
  SOLINK_MODULE(target) Release/obj.target/binding.node
  SOLINK_MODULE(target) Release/obj.target/binding.node: Finished
  COPY Release/binding.node
make: warning:  Clock skew detected.  Your build may be incomplete.
make: Leaving directory `/vagrant/app/node_modules/node-sass/build'
Installed in `/vagrant/app/node_modules/node-sass/bin/linux-x64-v8-3.14/binding.node`


$ node node_modules/node-sass/build.js 
`linux-x64-v8-3.14` exists; testing

  ․․․․․․․․․․․․․․․․․․

  18 passing (21ms)

Binary is fine; exiting