| diff --git b/rules.mk a/rules.mk | |
| index 838754b..19beb65 100644 | |
| --- b/rules.mk | |
| +++ a/rules.mk | |
| @@ -18,7 +18,9 @@ MODULE_RUSTFLAGS += \ | |
| --cfg 'feature="zeroize"' \ | |
| MODULE_LIBRARY_DEPS := \ | |
| - external/rust/crates/pem-rfc7468 \ | |
| - external/rust/crates/time \ | |
| + external/rust/crates/const-oid \ | |
| + external/rust/crates/der_derive \ | |
| + external/rust/crates/flagset \ | |
| + external/rust/crates/zeroize \ | |
| include make/library.mk |