From e132ba1a2afa158f3d42d97c9097ef69ea3a00c0 Mon Sep 17 00:00:00 2001
From: niten <niten@fudo.org>
Date: Thu, 28 Sep 2023 13:00:01 -0700
Subject: [PATCH] Seems TMPDIR doesn't exist

---
 dkim.nix | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/dkim.nix b/dkim.nix
index 7df1416..c4aedb9 100644
--- a/dkim.nix
+++ b/dkim.nix
@@ -10,13 +10,14 @@ let
       dkimTxt = "${keyDir}/${domain}.mail.txt";
     in ''
       if [ ! -f "${dkimKey}" ] || [ ! -f ${dkimTxt} ]; then
+        OUT=$(${pkgs.coreutils}/bin/mktemp -d -t dkim-XXXXXXXXXX)
         opendkim-genkey \
-          -s mail \
-          -d ${domain} \
+          --selector=mail \
+          --domain=${domain} \
           --bits="${toString cfg.key-bits}" \
-          --directory=$TMPDIR
-        mv $TMPDIR/mail.private ${dkimKey}
-        mv $TMPDIR/mail.txt ${dkimTxt}
+          --directory=$OUT
+        mv $OUT/mail.private ${dkimKey}
+        mv $OUT/mail.txt ${dkimTxt}
       fi
     '';