diff --git a/dkim.nix b/dkim.nix
index b707ab3..0c81e9a 100644
--- a/dkim.nix
+++ b/dkim.nix
@@ -25,11 +25,11 @@ let
     concatStringsSep "\n" (map (ensureDomainDkimCert keyDir) domains);
 
   makeKeyTable = keyDir: domains:
-    pkgs.writeText "opendkim-key-table" (concatStringsSep "\n"
+    pkgs.writeTextDir "key.table" (concatStringsSep "\n"
       (map (dom: "${dom}:mail:${keyDir}/${dom}.mail.key") domains));
 
   makeSigningTable = domains:
-    pkgs.writeText "opendkim-signing-table"
+    pkgs.writeText "signing.table"
     (concatStringsSep "\n" (map (dom: "${dom} ${dom}") domains));
 
   keyTable = makeKeyTable cfg.state-directory cfg.domains;