diff --git a/src/atom.coffee b/src/atom.coffee
index 8d5053254..c515f26be 100644
--- a/src/atom.coffee
+++ b/src/atom.coffee
@@ -280,7 +280,7 @@ class Atom extends Model
       deprecate "The atom.syntax global is deprecated. Use atom.grammars instead."
       @grammars
 
-    @subscribe @packages.onDidActivateAll => @watchThemes()
+    @subscribe @packages.onDidActivateInitialPackages => @watchThemes()
 
     Project = require './project'
     TextBuffer = require 'text-buffer'
diff --git a/src/menu-manager.coffee b/src/menu-manager.coffee
index bb4bfb2af..2c022cc32 100644
--- a/src/menu-manager.coffee
+++ b/src/menu-manager.coffee
@@ -61,7 +61,7 @@ class MenuManager
     @pendingUpdateOperation = null
     @template = []
     atom.keymaps.onDidLoadBundledKeymaps => @loadPlatformItems()
-    atom.packages.onDidActivateAll => @sortPackagesMenu()
+    atom.packages.onDidActivateInitialPackages => @sortPackagesMenu()
 
   # Public: Adds the given items to the application menu.
   #
diff --git a/src/package-manager.coffee b/src/package-manager.coffee
index e9064e01e..e3cc1c2a2 100644
--- a/src/package-manager.coffee
+++ b/src/package-manager.coffee
@@ -65,15 +65,19 @@ class PackageManager
   # * `callback` {Function}
   #
   # Returns a {Disposable} on which `.dispose()` can be called to unsubscribe.
+  onDidActivateInitialPackages: (callback) ->
+    @emitter.on 'did-activate-initial-packages', callback
+
   onDidActivateAll: (callback) ->
-    @emitter.on 'did-activate-all', callback
+    Grim.deprecate("Use `::onDidActivateInitialPackages` instead.")
+    @onDidActivateInitialPackages(callback)
 
   on: (eventName) ->
     switch eventName
       when 'loaded'
         deprecate 'Use PackageManager::onDidLoadAll instead'
       when 'activated'
-        deprecate 'Use PackageManager::onDidActivateAll instead'
+        deprecate 'Use PackageManager::onDidActivateInitialPackages instead'
       else
         deprecate 'PackageManager::on is deprecated. Use event subscription methods instead.'
     EmitterMixin::on.apply(this, arguments)
@@ -325,7 +329,7 @@ class PackageManager
       packages = @getLoadedPackagesForTypes(types)
       activator.activatePackages(packages)
     @emit 'activated'
-    @emitter.emit 'did-activate-all'
+    @emitter.emit 'did-activate-initial-packages'
 
   # another type of package manager can handle other package types.
   # See ThemeManager