gyp ERR! command "/root/parts/assets/npm/bin/node" "/root/parts/assets/build/node_modules/gulp-sass/node_modules/node-sass/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="                                                                          gyp ERR! cwd /root/parts/assets/build/node_modules/gulp-sass/node_modules/node-sass gyp ERR! node -v v4.4.4                                                             gyp ERR! node-gyp -v v3.4.0                                                         gyp ERR! not ok 
Build failed
npm ERR! Linux 4.4.0-1019-raspi2
npm ERR! argv "/root/parts/assets/npm/bin/node" "/root/parts/assets/npm/bin/npm" "install" "--only-development"
npm ERR! node v4.4.4                                                                npm ERR! npm  v2.15.1
npm ERR! code ELIFECYCLE                                                            
npm ERR! node-sass@3.8.0 postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the node-sass@3.8.0 postinstall script 'node scripts/build.js'.
npm ERR! This is most likely a problem with the node-sass package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node scripts/build.js
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs node-sass
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! 
npm ERR!     npm owner ls node-sass
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /root/parts/assets/build/npm-debug.log
Command '['/bin/sh', '/tmp/tmpzid20hth', 'npm', 'install', '--only-development']' returned non-zero exit status 1
Command '['lxc', 'exec', 'snapcraft-palindromically-sneakier-antwan', '--', 'snapcraft', 'snap', '--output', 'snapweb_0.20_armhf.snap']' returned non-zero exit status 1