Quentin Tarantino has said he is “very very depressed” at having to cancel filming on his upcoming project Hateful Eight after a copy of the film’s script found itself in the hands of several Hollywood agents against his wishes.

Tarantino told Deadline he only gave the script to six people, one of whom then gave it to his agent – a move that he has called “malicious.”

“I finished a script, a first draft, and I didn’t mean to shoot it until next winter, a year from now,” said Tarantino, who discovered the film had been leaked after his own agent, Mike Simpson, started getting calls from agents in Hollywood looking to cast their clients in the ensemble Western.

Tarantino has named a few names, listing actors Bruce Dern, Tim Roth and Michael Madsen, as well as Django Unchained producer Reggie Hudlin among those who had access to Hateful Eight’s script. “Hudlin … let an agent come to his house and read it,” Tarantino told Deadline. “That’s a betrayal, but not crippling because the agent didn’t end up with the script. There is an ugly maliciousness to the rest of it.”

The Pulp Fiction director said he knows Roth is the person behind the leak, but hasn’t ruled out any of the others. “It’s got to be either the agents of Dern or Madsen,” he said, adding that the calls were coming from the Creative Artists Agency, which represents Dern.

Tarantino now has plans to publish the film’s script – he’s currently scheduling meetings with publishers – and will be moving on to another project next. “I give it out to six people, and if I can’t trust them to that degree, then I have no desire to make it,” Tarantino said. “I’ll move on to the next thing. I’ve got 10 more where that came from.”

Tarantino’s last film, Django Unchained, won the award for best original screenplay at the 2013 Academy Awards. The film also earned Christoph Waltz an Oscar for his supporting role in the film – the German actor’s second such award for his work in a Tarantino movie (he won his first three years prior, for Inglourious Basterds.)