diff --git a/opengl/libs/EGL/Loader.cpp b/opengl/libs/EGL/Loader.cpp
index 0e8ce0e..399affc 100644
--- a/opengl/libs/EGL/Loader.cpp
+++ b/opengl/libs/EGL/Loader.cpp
@@ -28,7 +28,9 @@
 #include <cutils/properties.h>
 #include <log/log.h>
 
+#ifndef __ANDROID_VNDK__
 #include <graphicsenv/GraphicsEnv.h>
+#endif
 #include <vndksupport/linker.h>
 
 #include "egl_trace.h"
@@ -477,10 +479,12 @@
     ATRACE_CALL();
 
     void* dso = nullptr;
+#ifndef __ANDROID_VNDK__
     android_namespace_t* ns = android_getDriverNamespace();
     if (ns) {
         dso = load_updated_driver(kind, ns);
     }
+#endif
     if (!dso) {
         dso = load_system_driver(kind);
         if (!dso)
diff --git a/opengl/libs/EGL/eglApi.cpp b/opengl/libs/EGL/eglApi.cpp
index ba3a5f9..4914c44 100644
--- a/opengl/libs/EGL/eglApi.cpp
+++ b/opengl/libs/EGL/eglApi.cpp
@@ -1886,8 +1886,15 @@
 
 EGLClientBuffer eglGetNativeClientBufferANDROID(const AHardwareBuffer *buffer) {
     clearError();
+    // AHardwareBuffer_to_ANativeWindowBuffer is a platform-only symbol and thus
+    // this function cannot be implemented when this libEGL is built for
+    // vendors.
+#ifndef __ANDROID_VNDK__
     if (!buffer) return setError(EGL_BAD_PARAMETER, (EGLClientBuffer)0);
     return const_cast<ANativeWindowBuffer *>(AHardwareBuffer_to_ANativeWindowBuffer(buffer));
+#else
+    return setError(EGL_BAD_PARAMETER, (EGLClientBuffer)0);
+#endif
 }
 
 // ----------------------------------------------------------------------------
diff --git a/opengl/libs/EGL/egl_cache.cpp b/opengl/libs/EGL/egl_cache.cpp
index dc1a4af..579e422 100644
--- a/opengl/libs/EGL/egl_cache.cpp
+++ b/opengl/libs/EGL/egl_cache.cpp
@@ -26,6 +26,7 @@
 #include <inttypes.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
+#include <unistd.h>
 
 #include <thread>