diff --git a/mail-server/dovecot.nix b/mail-server/dovecot.nix
index ab08b6e..b022996 100644
--- a/mail-server/dovecot.nix
+++ b/mail-server/dovecot.nix
@@ -61,7 +61,6 @@ let
 
   postfixCfg = config.services.postfix;
 
-  ldapUuidAttribute = cfg.ldap.attributes.uuid;
   ldapConfig = pkgs.writeTextFile {
     name = "dovecot-ldap.conf.ext.template";
     text = ''
@@ -78,10 +77,11 @@ let
       base = ${cfg.ldap.base}
       scope = ${mkLdapSearchScope cfg.ldap.scope}
       user_attrs = \
-        ${ldapUuidAttribute}=${ldapUuidAttribute}, \
-        =home=${cfg.storage.path}/ldap/%{ldap:${ldapUuidAttribute}}, \
+        =home=${cfg.storage.path}/ldap/%{ldap:${cfg.ldap.attributes.uuid}}, \
         =mail=maildir:~/mail${maildirLayoutAppendix}${maildirUTF8FolderNames}${
-          lib.optionalString (cfg.indexDir != null) ":INDEX=${cfg.indexDir}/ldap/%{ldap:${ldapUuidAttribute}}"
+          lib.optionalString (
+            cfg.indexDir != null
+          ) ":INDEX=${cfg.indexDir}/ldap/%{ldap:${cfg.ldap.attributes.uuid}}"
         }
       user_filter = ${cfg.ldap.dovecot.userFilter}
       pass_attrs = ${cfg.ldap.attributes.password}=password