diff --git a/rootdir/Android.bp b/rootdir/Android.bp
index bbc5053..1e7b48b 100644
--- a/rootdir/Android.bp
+++ b/rootdir/Android.bp
@@ -167,11 +167,11 @@
     srcs: ["init.environ.rc.in"],
     out: ["init.environ.rc"],
     cmd: "cp -f $(in) $(out) && " +
-        "sed -i -e 's?%EXPORT_GLOBAL_ASAN_OPTIONS%?" + EXPORT_GLOBAL_ASAN_OPTIONS + "?g' $(out) && " +
-        "sed -i -e 's?%EXPORT_GLOBAL_GCOV_OPTIONS%?" + EXPORT_GLOBAL_GCOV_OPTIONS + "?g' $(out) && " +
-        "sed -i -e 's?%EXPORT_GLOBAL_CLANG_COVERAGE_OPTIONS%?" + EXPORT_GLOBAL_CLANG_COVERAGE_OPTIONS + "?g' $(out) && " +
-        "sed -i -e 's?%EXPORT_GLOBAL_HWASAN_OPTIONS%?" + EXPORT_GLOBAL_HWASAN_OPTIONS + "?g' $(out) && " +
-        "sed -i -e 's?%EXPORT_GLOBAL_SCUDO_ALLOCATION_RING_BUFFER_SIZE%?" + EXPORT_GLOBAL_SCUDO_ALLOCATION_RING_BUFFER_SIZE + "?g' $(out)",
+        "echo '    " + EXPORT_GLOBAL_ASAN_OPTIONS + "' >> $(out) && " +
+        "echo '    " + EXPORT_GLOBAL_GCOV_OPTIONS + "' >> $(out) && " +
+        "echo '    " + EXPORT_GLOBAL_CLANG_COVERAGE_OPTIONS + "' >> $(out) && " +
+        "echo '    " + EXPORT_GLOBAL_HWASAN_OPTIONS + "' >> $(out) && " +
+        "echo '    " + EXPORT_GLOBAL_SCUDO_ALLOCATION_RING_BUFFER_SIZE + "' >> $(out)",
 }
 
 prebuilt_root {
diff --git a/rootdir/init.environ.rc.in b/rootdir/init.environ.rc.in
index 7ba1f46..9249270 100644
--- a/rootdir/init.environ.rc.in
+++ b/rootdir/init.environ.rc.in
@@ -10,8 +10,5 @@
     export ANDROID_TZDATA_ROOT /apex/com.android.tzdata
     export EXTERNAL_STORAGE /sdcard
     export ASEC_MOUNTPOINT /mnt/asec
-    %EXPORT_GLOBAL_ASAN_OPTIONS%
-    %EXPORT_GLOBAL_GCOV_OPTIONS%
-    %EXPORT_GLOBAL_CLANG_COVERAGE_OPTIONS%
-    %EXPORT_GLOBAL_HWASAN_OPTIONS%
-    %EXPORT_GLOBAL_SCUDO_ALLOCATION_RING_BUFFER_SIZE%
+    # Additional environment variables will be appended here during build (see Android.bp).
+    # DO NOT ADD additional sections like 'on <event>' here.