diff --git a/.circleci/build-wheel.sh b/.circleci/build-wheel.sh
index d69e8c9213fe..1cd80487992b 100755
--- a/.circleci/build-wheel.sh
+++ b/.circleci/build-wheel.sh
@@ -23,8 +23,8 @@ if [[ "${PYBIN}" =~ $REGEX ]]; then
     PY_LIMITED_API="--py-limited-api=cp3${BASH_REMATCH[1]}"
 fi
 
-LDFLAGS="-L/opt/pyca/cryptography/openssl/lib" \
-       CFLAGS="-I/opt/pyca/cryptography/openssl/include -Wl,--exclude-libs,ALL" \
+OPENSSL_DIR="/opt/pyca/cryptography/openssl" \
+       RUSTFLAGS="-Clink-arg=-Wl,--exclude-libs,ALL" \
        ../../.venv/bin/python setup.py bdist_wheel "$PY_LIMITED_API"
 
 auditwheel repair --plat "${PLATFORM}" -w wheelhouse/ dist/cryptography*.whl