El Capitan missing openssl header files

[Geraldf]

Running npm install will result in an error message indicating missing openssl header files:

> airtunes@0.1.7 install /Users/geraldf/node_modules/airtunes
> node-gyp rebuild
  CXX(target) Release/obj.target/airtunes/src/codec.o
../src/codec.cc:5:10: fatal error: 'openssl/aes.h' file not found
#include <openssl/aes.h>

After reading the web, it seams that the header files have been excluded from el capitan. the libraries should be still there.
I have no idea to change the npm install method to use a different location for the openssl header files.

[clanger9]

I was able to install airtunes on El Capitan by first installing OpenSSL (via macports) and then specifying the location to the new headers with:
CXXFLAGS=-I/opt/local/include LDFLAGS=-L/opt/local/lib npm install airtunes

[Geraldf]

In which file did you make the changes to CXXFLAGS?

[clanger9]

I did not make any file changes - that is the command I used to build & install.