diff -Nurb --strip-trailing-cr plague-0.4.5.8-orig/client/client.py plague-0.4.5.8/client/client.py
--- plague-0.4.5.8-orig/client/client.py	2008-08-23 12:29:55.000000000 +0200
+++ plague-0.4.5.8/client/client.py	2013-08-08 12:53:59.642587482 +0200
@@ -144,13 +144,10 @@
         return cfg_email
 
     def _cmd_build(self, args):
-        if len(args) != 2 and len(args) != 3:
-            raise CommandException("Invalid command.  The 'build' command takes 3 arguments.")
-
         # Be smart about local SRPMs getting enqueued
-        if args[0].find('/') != -1 and os.path.exists(args[0]):
+        if len(args) >= 2 and args[0].find('/') != -1 and os.path.exists(args[0]):
             # We were given an RPM, find the package name
-            import rpmUtils
+            import rpmUtils.transaction
             ts = rpmUtils.transaction.initReadOnlyTransaction()
             hdr = rpmUtils.miscutils.hdrFromPackage(ts, args[0])
             package = hdr['name']
@@ -158,10 +155,12 @@
             target_alias = args[1]
             del hdr
             del ts
-        else:
+        elif len(args) == 3:
             package = args[0]
             source = args[1]
             target_alias = args[2]
+        else:
+            raise CommandException("Invalid number of arguments.")
 
         is_srpm = False
         if source.endswith(".src.rpm"):