Error with: npm install pdf-fill-form

The solution to following error..

pdf-fill-form@2.0.0 install /Users/jack/node-playground/test-pdf/node_modules/pdf-fill-form
node-gyp rebuild
CXX(target) Release/obj.target/pdf_fill_form/src/pdf-fill-form.o
CXX(target) Release/obj.target/pdf_fill_form/src/NodePopplerAsync.o
CXX(target) Release/obj.target/pdf_fill_form/src/NodePoppler.o
../src/NodePoppler.cc:9:10: fatal error: 'poppler/qt4/poppler-form.h' file not found
#include 
^
1 error generated.
make: *** [Release/obj.target/pdf_fill_form/src/NodePoppler.o] Error 1
gyp ERR! build error 
gyp ERR! stack Error: make failed with exit code: 2
gyp ERR! stack at ChildProcess.onExit (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:276:23)
gyp ERR! stack at emitTwo (events.js:106:13)
gyp ERR! stack at ChildProcess.emit (events.js:191:7)
gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:204:12)
gyp ERR! System Darwin 15.5.0
gyp ERR! command "/usr/local/bin/node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/jack/node-playground/test-pdf/node_modules/pdf-fill-form
gyp ERR! node -v v6.0.0
gyp ERR! node-gyp -v v3.4.0
gyp ERR! not ok 
npm WARN test-pdf@1.0.0 No description
npm WARN test-pdf@1.0.0 No repository field.
npm ERR! Darwin 15.5.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "pdf-fill-form" "--save"
npm ERR! node v6.0.0
npm ERR! npm v3.10.5
npm ERR! code ELIFECYCLE

npm ERR! pdf-fill-form@2.0.0 install: node-gyp rebuild
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the pdf-fill-form@2.0.0 install script 'node-gyp rebuild'.
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 pdf-fill-form 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 information on how to open an issue for this project with:
npm ERR! npm bugs pdf-fill-form
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls pdf-fill-form
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! /Users/jack/node-playground/test-pdf/npm-debug.log

..is to install Xcode first:

xcode-select --install

Then re-run:

npm install pdf-fill-form

Happy Coding!