Fix cargo build stuck at Blocking waiting for file lock on package cache

f cargo build is stuck at "Blocking waiting for file lock on package cache", it may indicate that another instance of Cargo is currently using the package cache.

Here are some steps you can take to resolve this issue:

Check for other instances of Cargo: First, make sure that there are no other instances of Cargo currently running on your system. You can check this by running ps -ef | grep cargo on Unix-based systems, or by using the Task Manager on Windows.

Delete the lock file: If there are no other instances of Cargo running, you can try deleting the lock file for the package cache. The lock file is located at $HOME/.cargo/.package-cache.lock. Deleting this file should allow Cargo to acquire the lock and continue with the build process.

Clear the package cache: If deleting the lock file doesn't work, you can try clearing the entire package cache. You can do this by running cargo clean followed by cargo build.

Use a different package cache: If the above steps don't work, you can try using a different package cache. You can do this by setting the CARGO_HOME environment variable to a different directory. For example, you can run export CARGO_HOME=/path/to/new/package/cache on Unix-based systems.

If none of these steps work, there may be an issue with your system configuration or with Cargo itself. You may want to try updating to the latest version of Cargo or reinstalling it from scratch.