Use devel/libffi from ports
Index: ext/ffi/Cargo.toml
--- ext/ffi/Cargo.toml.orig
+++ ext/ffi/Cargo.toml
@@ -22,7 +22,7 @@ deno_permissions.workspace = true
 denort_helper.workspace = true
 dlopen2.workspace = true
 libffi.workspace = true
-libffi-sys.workspace = true
+libffi-sys = { workspace = true, features = ["system"] }
 log.workspace = true
 memmap2.workspace = true
 num-bigint.workspace = true
