diff --git a/scripts/cargo.sh b/scripts/cargo.sh
index 1daa5a78f7bd..267b5d99a08d 100755
--- a/scripts/cargo.sh
+++ b/scripts/cargo.sh
@@ -10,9 +10,9 @@ cmd=$1
 shift || true
 
 if [[ "$cmd" = "jit" ]]; then
-cargo "+${TOOLCHAIN}" rustc "$@" -- -Cllvm-args=mode=jit -Cprefer-dynamic
+RUSTFLAGS="-Cprefer-dynamic" cargo "+${TOOLCHAIN}" rustc "$@" -- -Cllvm-args=mode=jit
 elif [[ "$cmd" = "lazy-jit" ]]; then
-cargo "+${TOOLCHAIN}" rustc "$@" -- -Cllvm-args=mode=jit-lazy -Cprefer-dynamic
+RUSTFLAGS="-Cprefer-dynamic" cargo "+${TOOLCHAIN}" rustc "$@" -- -Cllvm-args=mode=jit-lazy
 else
 cargo "+${TOOLCHAIN}" "$cmd" "$@"
 fi