Cannot build with no-std

[Martinits]

I'm adding some code using aes-gcm/aes/cmac into a large project which is built with no-std and its own std implementation. So my code has to be no-std. But there's error:

error[E0152]: duplicate lang item in crate `std` (which `crypto_common` depends on): `panic_impl`.

How to configure that crypto_common dependency to be no-std?
Here's some part of my code, it's no more than the examples:

    let k = Key::<Aes128Gcm>::from_slice(key);
    let cipher = Aes128Gcm::new(&k);
    let nonce = Nonce::from_slice(...);
    cipher.decrypt_in_place_detached(...).map_errr(...)

    let mut nonce = [0u8; 16];
    rand::thread_rng().fill_bytes(&mut nonce);
    let mut mac = Cmac::<Aes128>::new_from_slice(...).unwrap();
    mac.update(...);

[tarcieri]

You are likely not disabling default features somewhere that's enabling crypto-common/std. Try adding default-features = false to all of your crate imports.

Note that all of our crates are tested in CI on no_std targets, e.g.:

https://github.com/RustCrypto/AEADs/actions/runs/7422268132/job/20197225732

https://github.com/RustCrypto/MACs/actions/runs/7746508860/job/21124872030

...so it's definitely something in your project which is enabling the std feature somehow.