fix(link): a package is a link if any of its ancestors is a link

lib/install.js

@@ -638,7 +638,7 @@ Installer.prototype.cloneCurrentTreeToIdealTree = function (cb) {
   this.idealTree = copyTree(this.currentTree, (child) => {
     // Filter out any children we didn't install ourselves. They need to be
     // reinstalled in order for things to be correct.
-    return child.isTop || child.isLink || (
+    return child.isTop || isLink(child) || (
       child.package &&
       child.package._resolved &&
       (child.package._integrity || child.package._shasum)
@@ -648,6 +648,10 @@ Installer.prototype.cloneCurrentTreeToIdealTree = function (cb) {
   cb()
 }
 
+function isLink (child) {
+  return child.isLink || (child.parent && isLink(child.parent))
+}
+
 Installer.prototype.loadShrinkwrap = function (cb) {
   validate('F', arguments)
   log.silly('install', 'loadShrinkwrap')