| diff --git b/rules.mk a/rules.mk | |
| index 4e31c7c..17355aa 100644 | |
| --- b/rules.mk | |
| +++ a/rules.mk | |
| @@ -15,9 +15,8 @@ MODULE_RUSTFLAGS += \ | |
| --cfg 'feature="zeroize"' \ | |
| MODULE_LIBRARY_DEPS := \ | |
| - external/rust/crates/base16ct \ | |
| - external/rust/crates/generic-array \ | |
| - external/rust/crates/serdect \ | |
| - external/rust/crates/subtle \ | |
| + external/rust/crates/der \ | |
| + external/rust/crates/pkcs8 \ | |
| + external/rust/crates/zeroize \ | |
| include make/library.mk |