phoenix_application_heroku_error

remote: Compressing source files... done.
remote: Building source:
remote: 
remote: -----> Node.js app detected
remote: 
remote: -----> Creating runtime environment
remote:        
remote:        NPM_CONFIG_LOGLEVEL=error
remote:        NPM_CONFIG_PRODUCTION=true
remote:        NODE_ENV=production
remote:        NODE_MODULES_CACHE=true
remote: 
remote: -----> Installing binaries
remote:        engines.node (package.json):  unspecified
remote:        engines.npm (package.json):   unspecified (use default)
remote:        
remote:        Resolving node version (latest stable) via semver.io...
remote:        Downloading and installing node 5.10.1...
remote:        Using default npm version: 3.8.3
remote: 
remote: -----> Restoring cache
remote:        Skipping cache restore (new runtime signature)
remote: 
remote: -----> Building dependencies
remote:        Pruning any extraneous modules
remote:        Installing node modules (package.json)
remote:        npm ERR! addLocal Could not install /tmp/build_0a86929d1ce3a993764c090c52de654a/deps/phoenix
remote:        npm ERR! addLocal Could not install /tmp/build_0a86929d1ce3a993764c090c52de654a/deps/phoenix_html
remote:        npm ERR! Linux 3.13.0-79-generic
remote:        npm ERR! argv "/tmp/build_0a86929d1ce3a993764c090c52de654a/.heroku/node/bin/node" "/tmp/build_0a86929d1ce3a993764c090c52de654a/.heroku/node/bin/npm" "install" "--unsafe-perm"
 "--userconfig" "/tmp/build_0a86929d1ce3a993764c090c52de654a/.npmrc"
remote:        npm ERR! node v5.10.1
remote:        npm ERR! npm  v3.8.3
remote:        npm ERR! path /tmp/build_0a86929d1ce3a993764c090c52de654a/deps/phoenix
remote:        npm ERR! code ENOENT
remote:        npm ERR! errno -2
remote:        npm ERR! syscall open
remote:        
remote:        npm ERR! enoent ENOENT: no such file or directory, open '/tmp/build_0a86929d1ce3a993764c090c52de654a/deps/phoenix'
remote:        npm ERR! enoent ENOENT: no such file or directory, open '/tmp/build_0a86929d1ce3a993764c090c52de654a/deps/phoenix'
remote:        npm ERR! enoent This is most likely not a problem with npm itself
remote:        npm ERR! enoent and is related to npm not being able to find a file.
remote:        npm ERR! enoent
remote:        
remote:        npm ERR! Please include the following file with any support request:
remote:        npm ERR!     /tmp/build_0a86929d1ce3a993764c090c52de654a/npm-debug.log
remote: 
remote: -----> Build failed
remote:        
remote:        We're sorry this build is failing! You can troubleshoot common issues here:
remote:        https://devcenter.heroku.com/articles/troubleshooting-node-deploys
remote:        
remote:        Some possible problems:
remote:        
remote:        - Node version not specified in package.json
remote:        https://devcenter.heroku.com/articles/nodejs-support#specifying-a-node-js-version
remote:        
remote:        Love,
remote:        Heroku
remote:        
remote: 
remote:  !     Push rejected, failed to compile Node.js app
remote: 
remote: Verifying deploy...
remote: 
remote: !       Push rejected to vast-reaches-94322.
remote: 
To https://git.heroku.com/vast-reaches-94322.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/vast-reaches-94322.git'

node v5.10.1
npm v3.8.3
phoenix v1.1.4
elixir v1.2.1