The usual approach would be to define requirements in a way that are unsuitable for the specific vendor you want to get rid of. This is more common the other w

The usual approach would be to define requirements in a way that are unsuitable for the specific vendor you want to get rid of. This is more common the other way around, where a government wants a specific company to do a job, but is required to issue a public call for bids. In that case the requirements are just written exactly for that specific company.