Module not found when running deno run

Something weird has started happening.

When I run

deno run src/main.ts

deno run src/main.ts

it seems as if Deno is trying to run it from a completely bonkers file path.

error: Module not found "file:///Users/me/Projects/my-project/src/Users/me/Projects/my-project/src/main.ts".

error: Module not found "file:///Users/me/Projects/my-project/src/Users/me/Projects/my-project/src/main.ts".

I don't know what's happened and why it seems to append the Users folder twice.

Does anyone have any idea?