diff --git a/standalone/android/buildchroot b/standalone/android/buildchroot
index 3f4c8eaa90..b759ae6ce0 100755
--- a/standalone/android/buildchroot
+++ b/standalone/android/buildchroot
@@ -8,6 +8,13 @@ fi
 debootstrap --arch=i386 stable debian-stable-android
 cp $0-inchroot debian-stable-android/tmp
 cp $0-inchroot-asuser debian-stable-android/tmp
+
+# Don't use these vars in the chroot.
+unset TMP
+unset TEMP
+unset TMPDIR
+unset TEMPDIR
+
 chroot debian-stable-android "tmp/$(basename $0)-inchroot"
 
 echo