| diff --git b/rules.mk a/rules.mk | |
| index 25bd083..bd3edb9 100644 | |
| --- b/rules.mk | |
| +++ a/rules.mk | |
| @@ -12,8 +12,6 @@ MODULE_RUSTFLAGS += \ | |
| --cfg 'feature="alloc"' \ | |
| MODULE_LIBRARY_DEPS := \ | |
| - external/rust/crates/base64ct \ | |
| external/rust/crates/der \ | |
| - external/rust/crates/sha2 \ | |
| include make/library.mk |