README: update.

README.md

@@ -31,10 +31,10 @@ and then see the usage output:
 
 Build an x86 live image with runit and keyboard set to 'fr':
 
-    # ./mklive.sh -b base-system-runit -k fr
+    # ./mklive.sh -k fr
 
 Build an x86 live image with systemd and some optional packages:
 
-    # ./mklive.sh -p 'vim rtorrent'
+    # ./mklive.sh -b base-system-systemd -p 'vim rtorrent'
 
 See the usage output for more information :-)