Failed to build gem native extension (installing Compass)
Try this, then try to install compass again
apt-get install ruby-dev
In order to install compass On Mac OS X 10.10 (Yosemite)had to perform the following:
1. Set Up Ruby Environment
- Ensure ruby is installed and up to date:
ruby -v - Update gem's
sudo gem update --system
2. Set Up MAC Environment
Install the Xcode Command Line Tools this is the key to install Compass.
xcode-select --installInstalling the Xcode Command Line Tools are the key to getting Compass working on OS X
3. Install Compass
sudo gem install compass
The best way is sudo apt-get install ruby-compass to install compass.