diff --git a/sandbox/seccomp_bpf.target.darwin-arm.mk b/sandbox/seccomp_bpf.target.darwin-arm.mk
index aebe3e6..12bd54e 100644
--- a/sandbox/seccomp_bpf.target.darwin-arm.mk
+++ b/sandbox/seccomp_bpf.target.darwin-arm.mk
@@ -6,12 +6,13 @@
 LOCAL_MODULE := sandbox_seccomp_bpf_gyp
 LOCAL_MODULE_SUFFIX := .a
 LOCAL_MODULE_TAGS := optional
-gyp_intermediate_dir := $(call local-intermediates-dir)
-gyp_shared_intermediate_dir := $(call intermediates-dir-for,GYP,shared)
+LOCAL_MODULE_TARGET_ARCH := $(TARGET_$(GYP_VAR_PREFIX)ARCH)
+gyp_intermediate_dir := $(call local-intermediates-dir,,$(GYP_VAR_PREFIX))
+gyp_shared_intermediate_dir := $(call intermediates-dir-for,GYP,shared,,,$(GYP_VAR_PREFIX))
 
 # Make sure our deps are built first.
 GYP_TARGET_DEPENDENCIES := \
-	$(call intermediates-dir-for,GYP,sandbox_sandbox_services_headers_gyp)/sandbox_services_headers.stamp
+	$(call intermediates-dir-for,GYP,sandbox_sandbox_services_headers_gyp,,,$(GYP_VAR_PREFIX))/sandbox_services_headers.stamp
 
 GYP_GENERATED_OUTPUTS :=
 
@@ -87,6 +88,7 @@
 	'-DCLD_VERSION=1' \
 	'-DENABLE_PRINTING=1' \
 	'-DENABLE_MANAGED_USERS=1' \
+	'-DSANDBOX_IMPLEMENTATION' \
 	'-DUSE_OPENSSL=1' \
 	'-DUSE_OPENSSL_CERTS=1' \
 	'-D__STDC_CONSTANT_MACROS' \
@@ -173,6 +175,7 @@
 	'-DCLD_VERSION=1' \
 	'-DENABLE_PRINTING=1' \
 	'-DENABLE_MANAGED_USERS=1' \
+	'-DSANDBOX_IMPLEMENTATION' \
 	'-DUSE_OPENSSL=1' \
 	'-DUSE_OPENSSL_CERTS=1' \
 	'-D__STDC_CONSTANT_MACROS' \
@@ -215,9 +218,9 @@
 ### Rules for final target.
 
 LOCAL_LDFLAGS_Debug := \
-	-Wl,--fatal-warnings \
 	-Wl,-z,now \
 	-Wl,-z,relro \
+	-Wl,--fatal-warnings \
 	-Wl,-z,noexecstack \
 	-fPIC \
 	-Wl,-z,relro \
@@ -234,9 +237,9 @@
 
 
 LOCAL_LDFLAGS_Release := \
-	-Wl,--fatal-warnings \
 	-Wl,-z,now \
 	-Wl,-z,relro \
+	-Wl,--fatal-warnings \
 	-Wl,-z,noexecstack \
 	-fPIC \
 	-Wl,-z,relro \