Package: negative
Version: 1.0
Architecture: any
Build-Depends:
 foo <!stage1>,
 bar <!nocheck>,
 baz <!stage1 !nocheck>,
 blub <!stage1> <dummy>,
 bla <dummy> <!nocheck>

Package: positive
Version: 1.0
Architecture: any
Build-Depends:
 build-essential <stage1>,
 build-essential <nocheck>,
 build-essential <stage1 nocheck>,
 build-essential <stage1> <dummy>,
 build-essential <dummy> <nocheck>
