avoid bundling node-pre-gyp
avoid bundling node-pre-gyp

tomhughes/node-mapnik,tomhughes/node-mapnik,langateam/node-mapnik,mapnik/node-mapnik,CartoDB/node-mapnik,langateam/node-mapnik,langateam/node-mapnik,CartoDB/node-mapnik,CartoDB/node-mapnik,langateam/node-mapnik,mapnik/node-mapnik,mapnik/node-mapnik,tomhughes/node-mapnik,tomhughes/node-mapnik,CartoDB/node-mapnik,mapnik/node-mapnik,tomhughes/node-mapnik,CartoDB/node-mapnik,mapnik/node-mapnik,langateam/node-mapnik