Velocity/Mocha not working after 1.4 upgrade

Prior to the 1.4 update I had no issues running our test scripts with Velocity/Mocha. Now when I run meteor --test I get the following error in the mocha log:

/Users/bshamblen/.meteor/packages/velocity_meteor-tool/.1.1.10_2.166tkoq++os.osx.x86_64+web.browser+web.cordova/mt-os.osx.x86_64/dev_bundle/lib/node_modules/fibers/future.js:278
						throw(ex);
						      ^
Error: EEXIST, symlink '/Users/bshamblen/.meteor/packages/meteor-tool/.1.3.4_4.1wwuvv4++os.osx.x86_64+web.browser+web.cordova/mt-os.osx.x86_64/dev_bundle'
    at Object.Future.wait (/Users/bshamblen/.meteor/packages/velocity_meteor-tool/.1.1.10_2.166tkoq++os.osx.x86_64+web.browser+web.cordova/mt-os.osx.x86_64/dev_bundle/lib/node_modules/fibers/future.js:398:15)
    at /tools/fs/files.js:1331:28
    at Object.wrapper (/tools/fs/files.js:1334:20)
    at /tools/fs/files.js:461:13
    at Array.forEach (native)
    at Function._.each._.forEach (/Users/bshamblen/.meteor/packages/velocity_meteor-tool/.1.1.10_2.166tkoq++os.osx.x86_64+web.browser+web.cordova/mt-os.osx.x86_64/dev_bundle/lib/node_modules/underscore/underscore.js:79:11)
    at Object.files.cp_r (/tools/fs/files.js:446:5)
    at Command.doRunCommand [as func] (/tools/cli/commands.js:315:11)
    at /tools/cli/main.js:1378:23

Has anyone else run into this issue and come up with a solution?