diff --git a/build_library/build_image_util.sh b/build_library/build_image_util.sh
index 64a7a89b86..c2863b7bd1 100755
--- a/build_library/build_image_util.sh
+++ b/build_library/build_image_util.sh
@@ -529,7 +529,8 @@ insert_extra_slsa() {
     if [ -f "${binpkg}" ]; then
       info "Found ${atom} at ${binpkg}"
       qtbz2 -O -t "${binpkg}" | \
-        sudo tar -C "${rootfs}" -xj --wildcards './usr/share/SLSA'
+        lbzcat -d -c - | \
+        sudo tar -C "${rootfs}" -x --wildcards './usr/share/SLSA'
       continue
     fi
     warn "Missing SLSA information for ${atom}"
diff --git a/build_library/prod_image_util.sh b/build_library/prod_image_util.sh
index 183d57f9ef..050c31628e 100755
--- a/build_library/prod_image_util.sh
+++ b/build_library/prod_image_util.sh
@@ -44,7 +44,8 @@ extract_prod_gcc() {
     #  /usr/lib/gcc/x86_64-cros-linux-gnu/$version/*
     # Instead we extract them to plain old /usr/lib
     qtbz2 -O -t "${pkg}" | \
-        sudo tar -C "${root_fs_dir}" -xj \
+        lbzcat -d -c - | \
+        sudo tar -C "${root_fs_dir}" -x \
         --transform 's#/usr/lib/.*/#/usr/lib64/#' \
         --wildcards './usr/lib/gcc/*.so*' \
         --wildcards './usr/share/SLSA'