diff --git a/android-arm64/Dockerfile b/android-arm64/Dockerfile
index c22d370..cfee529 100644
--- a/android-arm64/Dockerfile
+++ b/android-arm64/Dockerfile
@@ -26,7 +26,7 @@ RUN mkdir -p /build && \
     cd android-ndk-r${ANDROID_NDK_REVISION} && \
     ./build/tools/make_standalone_toolchain.py \
       --arch arm64 \
-      --api $(ANDROID_NDK_API) \
+      --api ${ANDROID_NDK_API} \
       --stl=libc++ \
       --install-dir=${CROSS_ROOT} && \
     cd / && \