diff --git a/releases/specs/s390/s390/stage1-systemd-mu.spec b/releases/specs/s390/s390/stage1-systemd-mu.spec
new file mode 100644
index 00000000..0b62a1bd
--- /dev/null
+++ b/releases/specs/s390/s390/stage1-systemd-mu.spec
@@ -0,0 +1,12 @@
+subarch: s390
+version_stamp: systemd-mergedusr-@TIMESTAMP@
+target: stage1
+rel_type: default
+profile: default/linux/s390/17.0/systemd/merged-usr
+snapshot: @TIMESTAMP@
+source_subpath: default/stage3-s390-systemd-mergedusr-latest
+update_seed: no
+update_seed_command: --update --deep --newuse @world
+compression_mode: pixz
+portage_confdir: @REPO_DIR@/releases/portage/stages
+pkgcache_path: /var/tmp/catalyst/packages/default/stage1-s390
diff --git a/releases/specs/s390/s390/stage3-systemd-mu.spec b/releases/specs/s390/s390/stage3-systemd-mu.spec
new file mode 100644
index 00000000..db66c07c
--- /dev/null
+++ b/releases/specs/s390/s390/stage3-systemd-mu.spec
@@ -0,0 +1,10 @@
+subarch: s390
+version_stamp: systemd-mergedusr-@TIMESTAMP@
+target: stage3
+rel_type: default
+profile: default/linux/s390/17.0/systemd/merged-usr
+snapshot: @TIMESTAMP@
+source_subpath: default/stage1-s390-systemd-mergedusr-@TIMESTAMP@
+compression_mode: pixz
+portage_confdir: @REPO_DIR@/releases/portage/stages
+pkgcache_path: /var/tmp/catalyst/packages/default/stage3-s390
diff --git a/releases/specs/s390/s390x/stage1-systemd-mu.spec b/releases/specs/s390/s390x/stage1-systemd-mu.spec
new file mode 100644
index 00000000..b989e248
--- /dev/null
+++ b/releases/specs/s390/s390x/stage1-systemd-mu.spec
@@ -0,0 +1,12 @@
+subarch: s390x
+version_stamp: systemd-mergedusr-@TIMESTAMP@
+target: stage1
+rel_type: default
+profile: default/linux/s390/17.0/s390x/systemd/merged-usr
+snapshot: @TIMESTAMP@
+source_subpath: default/stage3-s390x-systemd-mergedusr-latest
+update_seed: no
+update_seed_command: --update --deep --newuse @world
+compression_mode: pixz
+portage_confdir: @REPO_DIR@/releases/portage/stages
+pkgcache_path: /var/tmp/catalyst/packages/default/stage1-s390x
diff --git a/releases/specs/s390/s390x/stage3-systemd-mu.spec b/releases/specs/s390/s390x/stage3-systemd-mu.spec
new file mode 100644
index 00000000..a89557b4
--- /dev/null
+++ b/releases/specs/s390/s390x/stage3-systemd-mu.spec
@@ -0,0 +1,10 @@
+subarch: s390x
+version_stamp: systemd-mergedusr-@TIMESTAMP@
+target: stage3
+rel_type: default
+profile: default/linux/s390/17.0/s390x/systemd/merged-usr
+snapshot: @TIMESTAMP@
+source_subpath: default/stage1-s390x-systemd-mergedusr-@TIMESTAMP@
+compression_mode: pixz
+portage_confdir: @REPO_DIR@/releases/portage/stages
+pkgcache_path: /var/tmp/catalyst/packages/default/stage3-s390x
diff --git a/tools/catalyst-auto-s390.conf b/tools/catalyst-auto-s390.conf
index 13810624..21336ad8 100644
--- a/tools/catalyst-auto-s390.conf
+++ b/tools/catalyst-auto-s390.conf
@@ -6,13 +6,15 @@ UPLOAD_KEY=/root/.ssh/id_rsa
 SPECS_DIR=${REPO_DIR}/releases/specs/s390/s390
 SUBARCH=s390
 
-SETS="openrc systemd"
+SETS="openrc systemd systemd_mu"
 
 SET_openrc_SPECS="stage1-openrc.spec stage3-openrc.spec"
 SET_openrc_OPTIONAL_SPECS="netboot/netboot.spec"
 
 SET_systemd_SPECS="stage1-systemd.spec stage3-systemd.spec"
 
+SET_systemd_mu_SPECS="stage1-systemd-mu.spec stage3-systemd-mu.spec"
+
 KCONFIG_DIR=${REPO_DIR}/releases/kconfig/s390
 
 update_symlinks() {
@@ -45,6 +47,9 @@ post_build() {
 	stage3-systemd.spec)
 		upload stage3-${SUBARCH}-systemd-${TIMESTAMP}.tar.xz*
 		;;
+	stage3-systemd-mu.spec)
+		upload stage3-${SUBARCH}-systemd-mergedusr-${TIMESTAMP}.tar.xz*
+		;;
 	*)
 		echo "Finished ${spec}"
 		;;
diff --git a/tools/catalyst-auto-s390x.conf b/tools/catalyst-auto-s390x.conf
index a49156a5..62042a7b 100644
--- a/tools/catalyst-auto-s390x.conf
+++ b/tools/catalyst-auto-s390x.conf
@@ -6,13 +6,15 @@ UPLOAD_KEY=/root/.ssh/id_rsa
 SPECS_DIR=${REPO_DIR}/releases/specs/s390/s390x
 SUBARCH=s390x
 
-SETS="openrc systemd"
+SETS="openrc systemd systemd_mu"
 
 SET_openrc_SPECS="stage1-openrc.spec stage3-openrc.spec"
 SET_openrc_OPTIONAL_SPECS="netboot/netboot.spec"
 
 SET_systemd_SPECS="stage1-systemd.spec stage3-systemd.spec"
 
+SET_systemd_mu_SPECS="stage1-systemd-mu.spec stage3-systemd-mu.spec"
+
 KCONFIG_DIR=${REPO_DIR}/releases/kconfig/s390
 
 update_symlinks() {
@@ -45,6 +47,9 @@ post_build() {
 	stage3-systemd.spec)
 		upload stage3-${SUBARCH}-systemd-${TIMESTAMP}.tar.xz*
 		;;
+	stage3-systemd-mu.spec)
+		upload stage3-${SUBARCH}-systemd-mergedusr-${TIMESTAMP}.tar.xz*
+		;;
 	*)
 		echo "Finished ${spec}"
 		;;