diff --git a/tools/compiler.js b/tools/compiler.js
index 5b16a1e306..bee0a0a49b 100644
--- a/tools/compiler.js
+++ b/tools/compiler.js
@@ -236,6 +236,9 @@ var lintUnibuild = function (options) {
     });
   });
 
+  // bail out early if there is not much to run
+  if (! allLinters.length) { return; }
+
   var watchSet = new watch.WatchSet;
   var sourceItems = inputSourceArch.getSourcesFunc(sourceExtensions, watchSet);
   var wrappedSourceItems = _.map(sourceItems, function (source) {
diff --git a/tools/package-source.js b/tools/package-source.js
index 5cc6b1c615..2691a9f00e 100644
--- a/tools/package-source.js
+++ b/tools/package-source.js
@@ -1173,7 +1173,7 @@ _.extend(PackageSource.prototype, {
       sourceArch.watchSet.merge(projectWatchSet);
 
       // Determine source files
-      sourceArch.getSourcesFunc = function (extensions, watchSet) {
+      sourceArch.getSourcesFunc = _.once(function (extensions, watchSet) {
         var sourceInclude = _.map(
           extensions,
           function (isTemplate, ext) {
@@ -1341,7 +1341,7 @@ _.extend(PackageSource.prototype, {
         }
 
         return sources;
-      };
+      });
     });
 
     if (! self._checkCrossUnibuildVersionConstraints()) {