diff --git a/Containerfile b/Containerfile
index 5f1991b..e6d9e8a 100644
--- a/Containerfile
+++ b/Containerfile
@@ -33,3 +33,5 @@ RUN --mount=type=cache,target=/var/cache \
 	&& :
 
 COPY --from=build /usr/local/bin/genimage /usr/local/bin/genimage
+
+ENV BUILDAH_ISOLATION=chroot