diff --git a/lib/commoner.js b/lib/commoner.js
index <HASH>..<HASH> 100644
--- a/lib/commoner.js
+++ b/lib/commoner.js
@@ -241,14 +241,6 @@ Cp.cliBuildP = function(version) {
             // Ignore dependencies because we wouldn't know how to find them.
             this.ignoreDependencies = true;
 
-        } else if (stats.isFile(first)) {
-            sourceDir = workingDir;
-            outputDir = absolutePath(workingDir, args.pop());
-            roots = args.map(fileToId);
-
-            // Ignore dependencies because we wouldn't know how to find them.
-            this.ignoreDependencies = true;
-
         } else if (stats.isDirectory(first)) {
             sourceDir = first;
             outputDir = absolutePath(workingDir, args[1]);
Abandon the no-source-directory, multiple-file usage pattern.

In practice this is never what one wants. Instead of doing

    bin/commonize file1.js file2.js file3.js output/

one should simply use the directory-first pattern:

    bin/commonize . output/ file1 file2 file3