TypeError: Cannot read property 'visitClass' of undefined

I'm experiencing the following issue.
~/git/BlessCSS/bless (master=)$ rm node_modules/
~/git/BlessCSS/bless (master=)$ npm install
npm WARN deprecated graceful-fs@2.0.3: graceful-fs version 3 and before will fail on newer node releases. Please update to graceful-fs@^4.0.0 as soon as possible.

> fsevents@1.0.8 install /Users/paulyoung/git/BlessCSS/bless/node_modules/fsevents
> node-pre-gyp install --fallback-to-build

[fsevents] Success: "/Users/paulyoung/git/BlessCSS/bless/node_modules/fsevents/lib/binding/Release/node-v47-darwin-x64/fse.node" is installed via remote

> bless@4.0.0 prepublish /Users/paulyoung/git/BlessCSS/bless
> npm run test && npm run build

> bless@4.0.0 test /Users/paulyoung/git/BlessCSS/bless
> ./run-tests

> npm run lint

> bless@4.0.0 lint /Users/paulyoung/git/BlessCSS/bless
> eslint ./

TypeError: Cannot read property 'visitClass' of undefined
    at monkeypatch (/Users/paulyoung/git/BlessCSS/bless/node_modules/babel-eslint/index.js:199:40)
    at Object.exports.parse (/Users/paulyoung/git/BlessCSS/bless/node_modules/babel-eslint/index.js:410:5)
    at parse (/Users/paulyoung/git/BlessCSS/bless/node_modules/eslint/lib/eslint.js:449:27)
    at EventEmitter.module.exports.api.verify (/Users/paulyoung/git/BlessCSS/bless/node_modules/eslint/lib/eslint.js:603:15)
    at processText (/Users/paulyoung/git/BlessCSS/bless/node_modules/eslint/lib/cli-engine.js:201:27)
    at processFile (/Users/paulyoung/git/BlessCSS/bless/node_modules/eslint/lib/cli-engine.js:226:12)
    at /Users/paulyoung/git/BlessCSS/bless/node_modules/eslint/lib/cli-engine.js:322:26
    at /Users/paulyoung/git/BlessCSS/bless/node_modules/eslint/lib/util/traverse.js:61:17
    at Array.forEach (native)
    at traverse (/Users/paulyoung/git/BlessCSS/bless/node_modules/eslint/lib/util/traverse.js:41:54)

npm ERR! Darwin 15.3.0
npm ERR! argv "/Users/paulyoung/.nvm/versions/v5.0.0/bin/node" "/Users/paulyoung/.nvm/versions/v5.0.0/bin/npm" "run" "lint"
npm ERR! node v5.0.0
npm ERR! npm  v3.6.0
npm ERR! code ELIFECYCLE
npm ERR! bless@4.0.0 lint: `eslint ./`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the bless@4.0.0 lint script 'eslint ./'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the bless package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     eslint ./
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs bless
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls bless
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /Users/paulyoung/git/BlessCSS/bless/npm-debug.log
{ code: 1, message: '`npm run lint` failed with code 1' }

npm ERR! Darwin 15.3.0
npm ERR! argv "/Users/paulyoung/.nvm/versions/v5.0.0/bin/node" "/Users/paulyoung/.nvm/versions/v5.0.0/bin/npm" "run" "test"
npm ERR! node v5.0.0
npm ERR! npm  v3.6.0
npm ERR! code ELIFECYCLE
npm ERR! bless@4.0.0 test: `./run-tests`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the bless@4.0.0 test script './run-tests'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the bless package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     ./run-tests
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs bless
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls bless
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /Users/paulyoung/git/BlessCSS/bless/npm-debug.log

npm ERR! Darwin 15.3.0
npm ERR! argv "/Users/paulyoung/.nvm/versions/v5.0.0/bin/node" "/Users/paulyoung/.nvm/versions/v5.0.0/bin/npm" "install"
npm ERR! node v5.0.0
npm ERR! npm  v3.6.0
npm ERR! code ELIFECYCLE
npm ERR! bless@4.0.0 prepublish: `npm run test && npm run build`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the bless@4.0.0 prepublish script 'npm run test && npm run build'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the bless package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     npm run test && npm run build
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs bless
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls bless
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /Users/paulyoung/git/BlessCSS/bless/npm-debug.log
~/git/BlessCSS/bless (master %=)$
BlessCSS / bless

TypeError: Cannot read property 'visitClass' of undefined #95
