diff --git a/meta/classes/sbom.bbclass b/meta/classes/sbom.bbclass
index b2e8aff6..43b8a71e 100644
--- a/meta/classes/sbom.bbclass
+++ b/meta/classes/sbom.bbclass
@@ -51,20 +51,14 @@ EOF
 }
 
 generate_sbom() {
-    run_privileged_heredoc <<'EOF'
-        mkdir -p ${SBOM_CHROOT_LOCAL}/mnt/rootfs \
-                 ${SBOM_CHROOT_LOCAL}/mnt/deploy-dir
-        tar -xf ${WORKDIR}/${ROOTFS_APT_STATE} --zstd \
-            -C ${SBOM_CHROOT_LOCAL}/mnt/rootfs
-EOF
-
     TIMESTAMP=$(date --iso-8601=s -d @${SOURCE_DATE_EPOCH})
+    unzstd < ${WORKDIR}/${ROOTFS_APT_STATE} | \
     bwrap \
         --unshare-user \
         --unshare-pid \
         --bind ${SBOM_CHROOT_LOCAL} / \
         --bind ${SBOM_LOCAL_DEPLOYDIR} /mnt/deploy-dir \
-        -- debsbom -v generate ${SBOM_DEBSBOM_TYPE_ARGS} -r /mnt/rootfs -o /mnt/deploy-dir/'${ROOTFS_PACKAGE_SUFFIX}' \
+        -- debsbom -v generate ${SBOM_DEBSBOM_TYPE_ARGS} -r - -o /mnt/deploy-dir/'${ROOTFS_PACKAGE_SUFFIX}' \
             --distro-name '${SBOM_DISTRO_NAME}' --distro-supplier '${SBOM_DISTRO_SUPPLIER}' \
             --distro-version '${SBOM_DISTRO_VERSION}' --distro-arch '${DISTRO_ARCH}' \
             --base-distro-vendor '${SBOM_BASE_DISTRO_VENDOR}' \