{
  'targets': [{
    'target_name': 'sharp',
    'sources': ['src/sharp.cc'],
    'variables': {
      'PKG_CONFIG_PATH': '<!(which brew >/dev/null 2>&1 && eval $(brew --env) && echo $PKG_CONFIG_LIBDIR || true):/usr/local/lib/pkgconfig:/usr/lib/pkgconfig'
    },
    'libraries': [
      '<!(PKG_CONFIG_PATH="<(PKG_CONFIG_PATH)" pkg-config --libs vips)'
    ],
    'include_dirs': [
      '<!(PKG_CONFIG_PATH="<(PKG_CONFIG_PATH)" pkg-config --cflags vips glib-2.0)',
      '<!(node -e "require(\'nan\')")'
    ],
    'cflags': ['-fexceptions', '-pedantic', '-Wall', '-O3'],
    'cflags_cc': ['-fexceptions', '-pedantic', '-Wall', '-O3']
  }]
}

@@ -205,16 +205,33 @@
 %7C true):
+$PKG_CONFIG_PATH:
 /usr/loc

Support existing path to pkg-config lib for Heroku #57