diff --git a/GNUmakefile b/GNUmakefile
index f76df100..03d395f8 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -23,6 +23,7 @@ HAVE_WIN := 0
 
 ifeq ($(shell test -d .git && which git > /dev/null && echo 1),1)
 export SOURCE_DATE_EPOCH=$(shell git log -1 --pretty=%ct)
+export TZ=UTC
 endif
 
 ifeq ($(UNAME_S),Darwin)
@@ -71,7 +72,7 @@ ANDROID_MIN_SDK_VERSION := 24
 ANDROID_TARGET_SDK_VERSION := 34
 ANDROID_BUILD_TOOLS := $(ANDROID_SDK)/build-tools/34.0.0
 ANDROID_PLATFORM := $(ANDROID_SDK)/platforms/android-$(ANDROID_TARGET_SDK_VERSION)
-ANDROID_NDK ?= $(ANDROID_SDK)/ndk/27.0.12077973
+ANDROID_NDK ?= $(ANDROID_SDK)/ndk/26.2.11394342
 
 ANDROID_ARMV7A_TARGETS := \
 	out/androiddebug-armv7a/tildefriends \