diff --git a/mobile/android/base/Makefile.in b/mobile/android/base/Makefile.in
index 2556217bd78..afd82ce3486 100644
--- a/mobile/android/base/Makefile.in
+++ b/mobile/android/base/Makefile.in
@@ -204,14 +204,14 @@ endif
 
 ifeq (,$(ANDROID_VERSION_CODE))
 ifeq ($(MIN_CPU_VERSION),7)
-ANDROID_VERSION_CODE=$(shell $(PYTHON) $(topsrcdir)/toolkit/xre/make-platformini.py --print-buildid | cut -c1-10)
+ANDROID_VERSION_CODE=$(shell cat $(DEPTH)/config/buildid | cut -c1-10)
 else
 # decrement the version code by 1 for armv6 builds so armv7 builds will win any compatability ties
-ANDROID_VERSION_CODE=$(shell echo `$(PYTHON) $(topsrcdir)/toolkit/xre/make-platformini.py --print-buildid | cut -c1-10` - 1 | bc)
+ANDROID_VERSION_CODE=$(shell echo $$((`cat $(DEPTH)/config/buildid | cut -c1-10` - 1)))
 endif
 endif
 
-UA_BUILDID=$(shell $(PYTHON) $(topsrcdir)/toolkit/xre/make-platformini.py --print-buildid | cut -c1-8)
+UA_BUILDID=$(shell echo $(ANDROID_VERSION_CODE) | cut -c1-8)
 
 # Mangle our package name to avoid Bug 750548.
 DEFINES += \