docs: function createDependencyLinks (dep, pkg, cb) {
    var depdir = path.join(npm.dir, dep.name, dep.version)
      , depsOn = path.join( depdir
                          , "dependson"
                          , pkg.name+"@"+pkg.version
                          )
      , deps = path.join(depdir, "node_modules", pkg.name)
      , targetRoot = path.join(npm.dir, pkg.name, pkg.version)
      , dependentLink = path.join( npm.dir
                                 , pkg.name
                                 , pkg.version
                                 , "dependents"
                                 , dep.name + "@" + dep.version
                                 )
    asyncMap
      ( [ [ link, targetRoot, depsOn ]
        , [ link, depdir, dependentLink ]
        , [ linkBins, pkg, path.join(depdir, "dep-bin"), false ]
        , [ linkModules, pkg, deps ]
        ]
      , function (c, cb) {
          c.shift().apply(null, c.concat(cb))
        }
      , cb
      )
  }