diff --git a/system-images/android/sdk/build-cmake-native b/system-images/android/sdk/build-cmake-native
--- a/system-images/android/sdk/build-cmake-native
+++ b/system-images/android/sdk/build-cmake-native
@@ -25,12 +25,12 @@
 cmake "$srcdir"/$name/$EXTRA_CMAKE_SUBDIR $@
 cmake --build . -- install -j`nproc`
 popd
-if [ "$PERSIST" ]; then
+if [ "$PERSIST" -eq 1 ]; then
     echo "leaving the build directory intact"
 else
     rm -rf $BUILDROOT/$name
 
-    if [ "$cloned" ]; then
+    if [ "$cloned" -eq 1 ]; then
         rm -rf src/$name
     fi
 fi