WASHINGTON (Seattle) — U.S. coffee importers and roasters are worried that a new auction system in Ethiopia makes it almost impossible for them to buy coffee from the particular farmers whose beans they want.

The system, overseen by the Ethiopia Commodity Exchange, mixes coffee beans from different growers before selling them for export.

That’s a big deal to specialty roasters who prefer beans from certain growers and processors, and sometimes have worked with them to improve quality.

During a visit to the Ethiopian exchange in February, one Seattle coffee importer became concerned about how the new system would work.

“We spent a whole day going through the phases of grief — anger, denial and acceptance — just trying to get our arms around what’s going on,” said Craig Holt, owner of Atlas Coffee Importers.

Last month, Ethiopia closed the warehouses of six of its largest exporters, accusing them of hoarding coffee and contributing to a shortage of foreign currency.

Bloomberg reported that the government plans to start exporting beans itself.

The changes haven’t affected Starbucks, a spokeswoman said. The company buys coffee through the exchange and from cooperative unions and estates, which are allowed to sell directly.

The U.S. imports 12 to 15 million pounds of Ethiopian coffee annually, less than 5 percent of that nation’s total coffee exports. Japan is the largest importer of Ethiopian coffee, taking about 66 million pounds a year, according to the Specialty Coffee Association of America.