fix scheduler

install.ce

@@ -2,6 +2,7 @@
 // Does not modify the current project's cell.toml
 
 var shop = use('shop')
+var build = use('build')
 
 if (args.length < 1) {
   log.console("Usage: cell install <locator>")
@@ -14,17 +15,18 @@ var locator = args[0]
 log.console("Installing " + locator + "...")
 if (!shop.update(locator)) {
     log.console("Failed to install " + locator)
-    $_.exit(1)
+    $_.stop()
+    return
 }
 
 var deps = shop.list_packages(locator)
 for (var dep of deps) {
   log.console("Installing dependency " + dep)
   shop.update(dep)
-  shop.build_package(dep)
+  build.build_package(dep)
 }
 
-shop.build_package(locator)
+build.build_package(locator)
 log.console("Installed " + locator)
 
 $_.stop()