1 diff --git b/rules.mk a/rules.mk
2 index c7476cb..0257d05 100644
3 --- b/rules.mk
4 +++ a/rules.mk
5 @@ -13,9 +13,6 @@ MODULE_RUSTFLAGS += \
6 
7  MODULE_LIBRARY_DEPS := \
8  	external/rust/crates/der \
9 -	external/rust/crates/pkcs5 \
10 -	external/rust/crates/rand_core \
11  	external/rust/crates/spki \
12 -	external/rust/crates/subtle \
13 
14  include make/library.mk
15