Zurb Foundation CLI: `new <project> --libsass` throws fatal error

gistfile1.txt

bede-rmbp:www bede$ foundation new project --libsass
Creating ./project
      create  project
Cloning into 'project'...
remote: Counting objects: 173, done.
remote: Total 173 (delta 0), reused 0 (delta 0), pack-reused 173
Receiving objects: 100% (173/173), 235.17 KiB | 436.00 KiB/s, done.
Resolving deltas: 100% (63/63), done.
Checking connectivity... done.
Installing dependencies with bower...
         run  npm install from "./project"
npm WARN package.json [email protected] No repository field.
-
> [email protected] install /Users/bede/Websites/Clients/Haroun/v3.0/www/project/node_modules/node-sass
> node scripts/install.js

Binary downloaded and installed at /Users/bede/Websites/Clients/Haroun/v3.0/www/project/node_modules/node-sass/vendor/darwin-x64/binding.node

> [email protected] postinstall /Users/bede/Websites/Clients/Haroun/v3.0/www/project/node_modules/node-sass
> node scripts/build.js

`darwin-x64` exists; testing
module.js:355
  Module._extensions[extension](this, filename);
                               ^
Error: Module did not self-register.
    at Error (native)
    at Module.load (module.js:355:32)
    at Function.Module._load (module.js:310:12)
    at Module.require (module.js:365:17)
    at require (module.js:384:17)
    at Object.<anonymous> (/Users/bede/Websites/Clients/Haroun/v3.0/www/project/node_modules/node-sass/lib/index.js:181:15)
    at Module._compile (module.js:460:26)
    at Object.Module._extensions..js (module.js:478:10)
    at Module.load (module.js:355:32)
    at Function.Module._load (module.js:310:12)
npm ERR! Darwin 14.1.0
npm ERR! argv "node" "/usr/local/bin/npm" "install"
npm ERR! node v0.12.0
npm ERR! npm  v2.6.0
npm ERR! code ELIFECYCLE

npm ERR! [email protected] postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the [email protected] postinstall script 'node scripts/build.js'.
npm ERR! This is most likely a problem with the node-sass package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node scripts/build.js
npm ERR! You can get their info via:
npm ERR!     npm owner ls node-sass
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /Users/bede/Websites/Clients/Haroun/v3.0/www/project/npm-debug.log
         run  grunt build from "./project"
Running "sass:dist" (sass) task
Fatal error: undefined is not a function
./project was created