> ursa@0.9.4 install /Users/user_name/.nvm/versions/node/v8.11.4/lib/node_modules/loopback-cli/node_modules/ursa
> node-gyp rebuild

  CXX(target) Release/obj.target/ursaNative/src/ursaNative.o
make: /usr/bin/g++-4.0: No such file or directory
make: *** [Release/obj.target/ursaNative/src/ursaNative.o] Error 1
gyp ERR! build error
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack     at ChildProcess.onExit (/Users/user_name/.nvm/versions/node/v8.11.4/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:258:23)
gyp ERR! stack     at emitTwo (events.js:126:13)
gyp ERR! stack     at ChildProcess.emit (events.js:214:7)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:198:12)
gyp ERR! System Darwin 17.7.0
gyp ERR! command "/Users/user_name/.nvm/versions/node/v8.11.4/bin/node" "/Users/user_name/.nvm/versions/node/v8.11.4/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/user_name/.nvm/versions/node/v8.11.4/lib/node_modules/loopback-cli/node_modules/ursa
gyp ERR! node -v v8.11.4
gyp ERR! node-gyp -v v3.6.2
gyp ERR! not ok