diff --git a/pkgs/servers/sql/mariadb/cmake-disable-auth-pam-testing.patch b/pkgs/servers/sql/mariadb/cmake-disable-auth-pam-testing.patch
deleted file mode 100644
index 864ee818d3c1..000000000000
--- a/pkgs/servers/sql/mariadb/cmake-disable-auth-pam-testing.patch
+++ /dev/null
@@ -1,12 +0,0 @@
-diff --git a/plugin/auth_pam/CMakeLists.txt b/plugin/auth_pam/CMakeLists.txt
-index a556b870..918a26f9 100644
---- a/plugin/auth_pam/CMakeLists.txt
-+++ b/plugin/auth_pam/CMakeLists.txt
-@@ -22,7 +22,6 @@ IF(HAVE_PAM_APPL_H)
-                    COMPONENT Server)
-   ENDIF()
-   IF(TARGET auth_pam OR TARGET auth_pam_v1)
--    ADD_SUBDIRECTORY(testing)
-     ADD_LIBRARY(pam_user_map MODULE mapper/pam_user_map.c)
-     TARGET_LINK_LIBRARIES(pam_user_map pam)
-     SET_TARGET_PROPERTIES (pam_user_map PROPERTIES PREFIX "")
diff --git a/pkgs/servers/sql/mariadb/default.nix b/pkgs/servers/sql/mariadb/default.nix
index 9af4fe0f0f1a..9c2134e211ff 100644
--- a/pkgs/servers/sql/mariadb/default.nix
+++ b/pkgs/servers/sql/mariadb/default.nix
@@ -162,10 +162,7 @@ server = stdenv.mkDerivation (common // {
     ++ optional stdenv.hostPlatform.isLinux linux-pam
     ++ optional (!stdenv.hostPlatform.isDarwin) mytopEnv;
 
-  patches = common.patches ++ [
-    # Disable build unused plugin pam_mariadb_mtr.so. See https://jira.mariadb.org/browse/MDEV-21654
-    ./cmake-disable-auth-pam-testing.patch
-  ] ++ optionals stdenv.hostPlatform.isDarwin [
+  patches = common.patches ++ optionals stdenv.hostPlatform.isDarwin [
     ./cmake-without-plugin-auth-pam.patch
   ];
 
@@ -204,6 +201,9 @@ server = stdenv.mkDerivation (common // {
     chmod +x "$out"/bin/wsrep_sst_common
     rm "$out"/bin/{mariadb-client-test,mariadb-test,mysql_client_test,mysqltest}
     rm -r "$out"/data # Don't need testing data
+    mv "$out"/OFF/suite/plugins/pam/pam_mariadb_mtr.so "$out"/share/pam/lib/security
+    mv "$out"/OFF/suite/plugins/pam/mariadb_mtr "$out"/share/pam/etc/security
+    rm -r "$out"/OFF
   '' + optionalString withStorageMroonga ''
     mv "$out"/share/{groonga,groonga-normalizer-mysql} "$out"/share/doc/mysql
   '' + optionalString (!stdenv.hostPlatform.isDarwin) ''