update help

diff --git a/build b/build
index 26a4a5b..71c4c34 100755 (executable)
--- a/build
+++ b/build
@@ -121,16 +121,20 @@ Known Parameters:
 
   --no-checks Do not run post-build checks
 
+  --repository PATH
+             Use package repository at PATH. Supported formats are
+             rpm-md and yast2.
+             Alternatively zypp://NAME specifies the zypp
+             repository NAME. The repo must be refreshed with zypp
+             so package meta data is available locally. With emtpy
+             NAME all enabled repositories are used.
+
   --rpms path1:path2:...
               Specify path where to find the RPMs for the build system
 
   --arch arch1:arch2:...
               Specify what architectures to select from the RPMs
 
-  --useusedforbuild
-              Do not expand dependencies but search the specfile for
-              usedforbuild lines.
-
   --verify    Run verify when initializing the build root
 
   --extra-packs pack