1diff --git b/rules.mk a/rules.mk 2index 4e31c7c..17355aa 100644 3--- b/rules.mk 4+++ a/rules.mk 5@@ -15,9 +15,8 @@ MODULE_RUSTFLAGS += \ 6 --cfg 'feature="zeroize"' \ 7 8 MODULE_LIBRARY_DEPS := \ 9- external/rust/crates/base16ct \ 10- external/rust/crates/generic-array \ 11- external/rust/crates/serdect \ 12- external/rust/crates/subtle \ 13+ external/rust/crates/der \ 14+ external/rust/crates/pkcs8 \ 15+ external/rust/crates/zeroize \ 16 17 include make/library.mk 18