npm-expat fails compilation on Node 4

[bhushankummar]

make: *** [Release/obj.target/node_expat/node-expat.o] Error 1
make: Leaving directory /home/travis/build/bhushankumarl/amazon-mws/node_modules/xml2json/node_modules/node-expat/build' gyp ERR! build error gyp ERR! stack Error: make` failed with exit code: 2
gyp ERR! stack at ChildProcess.onExit (/home/travis/.nvm/versions/node/v4.8.4/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:276:23)
gyp ERR! stack at emitTwo (events.js:87:13)
gyp ERR! stack at ChildProcess.emit (events.js:172:7)
gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:211:12)
gyp ERR! System Linux 4.8.12-040812-generic
gyp ERR! command "/home/travis/.nvm/versions/node/v4.8.4/bin/node" "/home/travis/.nvm/versions/node/v4.8.4/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /home/travis/build/bhushankumarl/amazon-mws/node_modules/xml2json/node_modules/node-expat
gyp ERR! node -v v4.8.4
gyp ERR! node-gyp -v v3.4.0
gyp ERR! not ok
npm ERR! Linux 4.8.12-040812-generic
npm ERR! argv "/home/travis/.nvm/versions/node/v4.8.4/bin/node" "/home/travis/.nvm/versions/node/v4.8.4/bin/npm" "install"
npm ERR! node v4.8.4
npm ERR! npm v2.15.11
npm ERR! code ELIFECYCLE