diff --git a/install b/install
index 64cf04f..0ed1a05 100755
--- a/install
+++ b/install
@@ -859,6 +859,10 @@ wo_init_variables
 _run wo_clean_repo
 _run wo_download_gpg_keys
 
+# clean up stale repo list files so they get regenerated correctly
+rm -f /etc/apt/sources.list.d/openlitespeed.list 2>/dev/null
+rm -f /etc/apt/sources.list.d/mariadb.list 2>/dev/null
+
 if [ -z "$wo_force_install" ]; then
     # check distribution support
     wo_check_distro
diff --git a/wo/cli/plugins/stack_pref.py b/wo/cli/plugins/stack_pref.py
index 879baf0..b5564f0 100644
--- a/wo/cli/plugins/stack_pref.py
+++ b/wo/cli/plugins/stack_pref.py
@@ -27,8 +27,8 @@ def pre_pref(self, apt_packages):
     """Pre settings to do before installation packages"""
 
     if ("mariadb-server" in apt_packages or "mariadb-client" in apt_packages):
-        # add mariadb repository excepted on raspbian and ubuntu 19.04
-        if not (WOVar.wo_distro == 'raspbian'):
+        # add mariadb repository excepted on raspbian, trixie (uses native pkgs)
+        if not (WOVar.wo_distro == 'raspbian') and WOVar.wo_mysql_repo:
             Log.info(self, "Adding repository for MySQL, please wait...")
             mysql_pref = (
                 "Package: *\nPin: origin  deb.mariadb.org"
diff --git a/wo/core/variables.py b/wo/core/variables.py
index 3ba0c91..253492e 100644
--- a/wo/core/variables.py
+++ b/wo/core/variables.py
@@ -172,6 +172,9 @@ class WOVar():
         "mariadb-common", "python3-mysqldb"]
     if wo_distro == 'raspbian':
         mariadb_ver = '10.3'
+    elif wo_platform_codename == 'trixie':
+        mariadb_ver = ''
+        wo_mysql = wo_mysql + ["mariadb-backup"]
     else:
         mariadb_ver = '11.4'
         wo_mysql = wo_mysql + ["mariadb-backup"]
@@ -182,9 +185,13 @@ class WOVar():
     wo_clamav = ["clamav", "clamav-freshclam"]
 
     # APT repositories
-    wo_mysql_repo = ("deb [signed-by=/etc/apt/keyrings/mariadb-keyring.pgp] "
-                     "http://deb.mariadb.org/"
-                     f"{mariadb_ver}/{wo_distro} {wo_platform_codename} main")
+    if mariadb_ver:
+        wo_mysql_repo = ("deb [signed-by=/etc/apt/keyrings/mariadb-keyring.pgp] "
+                         "http://deb.mariadb.org/"
+                         f"{mariadb_ver}/{wo_distro} {wo_platform_codename} main")
+    else:
+        # trixie: use native Debian mariadb packages, no external repo
+        wo_mysql_repo = ""
     mariadb_repo_key = "https://mariadb.org/mariadb_release_signing_key.pgp"
     if wo_distro == 'ubuntu':
         # LSPHP comes from LiteSpeed repo (same as OLS)