error message for pub get

TEST=./grind  (before pub get), ./grind (after pub get)

The result is

sungguk@sungguk-Satellite-M100:~/program_store/spark/ide$ ./grind 
Unable to find dependency pacakges.
Please execute> pub get
Unable to open file: /home/sungguk/program_store/spark/ide/tool/packages/grinder/grinder.dart'file:///home/sungguk/program_store/spark/ide/tool/grind.dart': error: line 8 pos 1: library handler failed
import 'package:grinder/grinder.dart';