error: unknown lint: `clippy`
  --> $DIR/tool_lints-fail.rs:6:9
   |
LL | #![deny(clippy)]
   |         ^^^^^^
   |
note: the lint level is defined here
  --> $DIR/tool_lints-fail.rs:4:9
   |
LL | #![deny(unknown_lints)]
   |         ^^^^^^^^^^^^^

error: aborting due to previous error