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-rw-r--r--nixos/modules/services/mail/opendkim.nix1
1 files changed, 1 insertions, 0 deletions
diff --git a/nixos/modules/services/mail/opendkim.nix b/nixos/modules/services/mail/opendkim.nix
index beff57613afc5..f1ffc5d3aeef2 100644
--- a/nixos/modules/services/mail/opendkim.nix
+++ b/nixos/modules/services/mail/opendkim.nix
@@ -55,6 +55,7 @@ in {
       domains = mkOption {
         type = types.str;
         default = "csl:${config.networking.hostName}";
+        defaultText = literalExpression ''"csl:''${config.networking.hostName}"'';
         example = "csl:example.com,mydomain.net";
         description = ''
           Local domains set (see <literal>opendkim(8)</literal> for more information on datasets).