diff --git a/_config b/_config
index 5fdbc5e..a00b2d2 100644
--- a/_config
+++ b/_config
@@ -86,6 +86,13 @@ Macros:
 # SUSE SLFO specific change
 %if "%_project" == "SUSE:SLFO:1.1:Build" || "%{sub %_project 1 21}" == "SUSE:SLFO:1.1:Staging"
 
+# blosc2 is broken on s390x
+# disable it to meet maintenance exit criteria
+%ifarch s390x
+ BuildFlags: excludebuild:blosc2
+%endif
+
+
 # no mono on SLFO
 BuildFlags: excludebuild:gettext-runtime:gettext-csharp
 BuildFlags: excludebuild:meson:test
@@ -1210,7 +1217,12 @@ Prefer: -go1.21-openssl
 Prefer: -go1.23
 
 # have choice for kernel >= 4.1.0 needed by libbcc0: kernel-debug kernel-default kernel-default-base kernel-kvmsmall kernel-vanilla
-Prefer: kernel-default-base
+%ifarch s390x
+  # kernel-default-base does not boot on s390, s390 drivers are not included
+  Prefer: kernel-default
+%else
+  Prefer: kernel-default-base
+%endif
 # have choice for (kmod(sg.ko) if kernel) needed by suse-module-tools: kernel-default kernel-vanilla
 Prefer: -kernel-vanilla