Compile Xorg-server with Mesa3D

Hi!
I try compile target Xorg with Mesa3D but seems in this config compile is broken
here is patch which I made

b/package/x11r7/xserver_xorg-server/xserver_xorg-server.mk index e9d5f36..6272d48 100644

@@ -70,6 +70,8 @@ XSERVER_XORG_SERVER_CONF_OPT = --disable-config-hal \
 ifeq ($(BR2_PACKAGE_XSERVER_xorg),y)
 XSERVER_XORG_SERVER_DEPENDENCIES += mesa3d
 XSERVER_XORG_SERVER_CONF_OPT +=
--with-mesa-source="$(BUILD_DIR)/Mesa-$(MESA3D_VERSION)" --enable-xorg
+XSERVER_XORG_SERVER_CONF_ENV = GL_CFLAGS=$(STAGING_DIR)/usr
+XSERVER_XORG_SERVER_CONF_ENV += GL_LIBS=$(STAGING_DIR)/usr
 else
 XSERVER_XORG_SERVER_CONF_OPT += --disable-xorg

endif
@@ -126,3 +128,4 @@ endif

$(eval $(call AUTOTARGETS,package/x11r7,xserver_xorg-server))
+

But after I call make I have another error

/BR2/buildroot/output/staging/usr/bin/x86_64-linux-uclibc-ldconfig -r /BR2/buildroot/output/target 2>/dev/null
make: *** [target-finalize] Error 127
which I can't understand.
What I do wrong patch for Xorg or what?
Thank you!

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