diff --git a/src/fcmp_pp/fcmp_pp_rust/CMakeLists.txt b/src/fcmp_pp/fcmp_pp_rust/CMakeLists.txt
index 7bf7f444c..1ecec4363 100644
--- a/src/fcmp_pp/fcmp_pp_rust/CMakeLists.txt
+++ b/src/fcmp_pp/fcmp_pp_rust/CMakeLists.txt
@@ -98,13 +98,13 @@ if(CMAKE_BUILD_TYPE STREQUAL "Debug")
   if(SANITIZE)
     message(STATUS "Using Rust ASAN")
     # Rust ASAN is an experimental feature included in nightly at time of writing
-    set(CARGO_CMD RUSTFLAGS=-Zsanitizer=address cargo +nightly build --target "${RUST_TARGET}" ${CARGO_OPTIONS})
+    set(CARGO_CMD RUSTFLAGS=-Zsanitizer=address cargo +nightly build --locked --target "${RUST_TARGET}" ${CARGO_OPTIONS})
   else()
-    set(CARGO_CMD cargo build --target "${RUST_TARGET}" ${CARGO_OPTIONS})
+    set(CARGO_CMD cargo build --locked --target "${RUST_TARGET}" ${CARGO_OPTIONS})
   endif()
   set(TARGET_DIR "debug")
 else ()
-  set(CARGO_CMD cargo build --target "${RUST_TARGET}" --release ${CARGO_OPTIONS})
+  set(CARGO_CMD cargo build --locked --target "${RUST_TARGET}" --release ${CARGO_OPTIONS})
   set(TARGET_DIR "release")
 endif ()