Merge pull request #177 from dtolnay/permitcopyrename

Permit cross-device copy

action.yml

@@ -91,6 +91,8 @@ runs:
 
     - name: rustup toolchain install ${{steps.parse.outputs.toolchain}}
       run: rustup toolchain install ${{steps.parse.outputs.toolchain}}${{steps.flags.outputs.targets}}${{steps.flags.outputs.components}} --profile minimal${{steps.flags.outputs.downgrade}} --no-self-update
+      env:
+        RUSTUP_PERMIT_COPY_RENAME: 1
       shell: bash
 
     - run: rustup default ${{steps.parse.outputs.toolchain}}