diff --git a/releases/weekly/specs/s390/s390/stage1.spec b/releases/weekly/specs/s390/s390/stage1.spec
index 688688ee..4d0f4e87 100644
--- a/releases/weekly/specs/s390/s390/stage1.spec
+++ b/releases/weekly/specs/s390/s390/stage1.spec
@@ -6,4 +6,6 @@ profile: default/linux/s390/17.0
 snapshot: 2008.0
 source_subpath: default/stage3-s390-latest
 update_seed: yes
+compression_mode: pixz_x
+decompressor_search_order: tar pixz xz lbzip2 bzip2 gzip
 portage_confdir: @REPO_DIR@/releases/weekly/portage/stages
diff --git a/releases/weekly/specs/s390/s390/stage2.spec b/releases/weekly/specs/s390/s390/stage2.spec
index 8e5979a0..91c49246 100644
--- a/releases/weekly/specs/s390/s390/stage2.spec
+++ b/releases/weekly/specs/s390/s390/stage2.spec
@@ -5,4 +5,6 @@ rel_type: default
 profile: default/linux/s390/17.0
 snapshot: 2008.0
 source_subpath: default/stage1-s390-2008.0
+compression_mode: pixz_x
+decompressor_search_order: tar pixz xz lbzip2 bzip2 gzip
 portage_confdir: @REPO_DIR@/releases/weekly/portage/stages
diff --git a/releases/weekly/specs/s390/s390/stage3.spec b/releases/weekly/specs/s390/s390/stage3.spec
index b2cb492f..a1e4e43b 100644
--- a/releases/weekly/specs/s390/s390/stage3.spec
+++ b/releases/weekly/specs/s390/s390/stage3.spec
@@ -5,4 +5,6 @@ rel_type: default
 profile: default/linux/s390/17.0
 snapshot: 2008.0
 source_subpath: default/stage1-s390-2008.0
+compression_mode: pixz_x
+decompressor_search_order: tar pixz xz lbzip2 bzip2 gzip
 portage_confdir: @REPO_DIR@/releases/weekly/portage/stages
diff --git a/releases/weekly/specs/s390/s390x/stage1.spec b/releases/weekly/specs/s390/s390x/stage1.spec
index cd203149..cfeec382 100644
--- a/releases/weekly/specs/s390/s390x/stage1.spec
+++ b/releases/weekly/specs/s390/s390x/stage1.spec
@@ -6,4 +6,6 @@ profile: default/linux/s390/17.0/s390x
 snapshot: 2008.0
 source_subpath: default/stage3-s390x-latest
 update_seed: yes
+compression_mode: pixz_x
+decompressor_search_order: tar pixz xz lbzip2 bzip2 gzip
 portage_confdir: @REPO_DIR@/releases/weekly/portage/stages
diff --git a/releases/weekly/specs/s390/s390x/stage2.spec b/releases/weekly/specs/s390/s390x/stage2.spec
index 99e92d2f..33f5e748 100644
--- a/releases/weekly/specs/s390/s390x/stage2.spec
+++ b/releases/weekly/specs/s390/s390x/stage2.spec
@@ -5,4 +5,6 @@ rel_type: default
 profile: default/linux/s390/17.0/s390x
 snapshot: 2008.0
 source_subpath: default/stage1-s390x-2008.0
+compression_mode: pixz_x
+decompressor_search_order: tar pixz xz lbzip2 bzip2 gzip
 portage_confdir: @REPO_DIR@/releases/weekly/portage/stages
diff --git a/releases/weekly/specs/s390/s390x/stage3.spec b/releases/weekly/specs/s390/s390x/stage3.spec
index 5fc21b45..0fbacf04 100644
--- a/releases/weekly/specs/s390/s390x/stage3.spec
+++ b/releases/weekly/specs/s390/s390x/stage3.spec
@@ -5,4 +5,6 @@ rel_type: default
 profile: default/linux/s390/17.0/s390x
 snapshot: 2008.0
 source_subpath: default/stage1-s390x-2008.0
+compression_mode: pixz_x
+decompressor_search_order: tar pixz xz lbzip2 bzip2 gzip
 portage_confdir: @REPO_DIR@/releases/weekly/portage/stages