Cannot install on Mac - Githubissues

OS: Mac OS X 10.10.4 Atom: latest
I clone the project in ~/Downloads and then cd to the directory and apm install but error popped up.
runas@2.0.0 install /Users/Zack/Downloads/atom-notebook/node_modules/pathwatcher/node_modules/runas
> node-gyp rebuild

  CXX(target) Release/obj.target/runas/src/main.o
  CXX(target) Release/obj.target/runas/src/runas_darwin.o
  CXX(target) Release/obj.target/runas/src/fork.o
  SOLINK_MODULE(target) Release/runas.node
  SOLINK_MODULE(target) Release/runas.node: Finished

> zmq@2.12.0 install /Users/Zack/Downloads/atom-notebook/node_modules/jupyter-kernel-launcher/node_modules/jmp/node_modules/zmq
> node-gyp rebuild

> pathwatcher@4.4.3 install /Users/Zack/Downloads/atom-notebook/node_modules/pathwatcher
> node-gyp rebuild

  CXX(target) Release/obj.target/pathwatcher/src/main.o
  CXX(target) Release/obj.target/pathwatcher/src/common.o
  CXX(target) Release/obj.target/pathwatcher/src/handle_map.o
  CXX(target) Release/obj.target/pathwatcher/src/pathwatcher_mac.o
  SOLINK_MODULE(target) Release/pathwatcher.node
  SOLINK_MODULE(target) Release/pathwatcher.node: Finished

xcode-select: error: tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance

xcode-select: error: tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance

Package libzmq was not found in the pkg-config search path.
Perhaps you should add the directory containing `libzmq.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libzmq' found
gyp: Call to 'pkg-config libzmq --libs' returned exit status 1. while trying to load binding.gyp
gyp ERR! configure error 
gyp ERR! stack Error: `gyp` failed with exit code: 1
gyp ERR! stack     at ChildProcess.onCpExit (/Applications/Atom.app/Contents/Resources/app/apm/node_modules/npm/node_modules/node-gyp/lib/configure.js:343:16)
gyp ERR! stack     at ChildProcess.emit (events.js:98:17)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (child_process.js:820:12)
gyp ERR! System Darwin 14.4.0
gyp ERR! command "node" "/Applications/Atom.app/Contents/Resources/app/apm/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/Zack/Downloads/atom-notebook/node_modules/jupyter-kernel-launcher/node_modules/jmp/node_modules/zmq
gyp ERR! node -v v0.10.35
gyp ERR! node-gyp -v v1.0.2
gyp ERR! not ok 
xcode-select: error: tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance

xcode-select: error: tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance

npm ERR! Darwin 14.4.0
npm ERR! argv "/Applications/Atom.app/Contents/Resources/app/apm/bin/node" "/Applications/Atom.app/Contents/Resources/app/apm/node_modules/npm/bin/npm-cli.js" "--globalconfig" "/Users/Zack/.atom/.apm/.apmrc" "--userconfig" "/Users/Zack/.atom/.apmrc" "install" "--target=0.22.0" "--arch=x64"
npm ERR! node v0.10.35
npm ERR! npm  v2.5.1
npm ERR! code ELIFECYCLE

npm ERR! zmq@2.12.0 install: `node-gyp rebuild`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the zmq@2.12.0 install script 'node-gyp rebuild'.
npm ERR! This is most likely a problem with the zmq package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node-gyp rebuild
npm ERR! You can get their info via:
npm ERR!     npm owner ls zmq
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /Users/Zack/Downloads/atom-notebook/npm-debug.log
jupyter / atom-notebook

Cannot install on Mac #5
