diff --git a/backup.nix b/backup.nix
index b2ad438..f4fd03e 100644
--- a/backup.nix
+++ b/backup.nix
@@ -23,11 +23,12 @@ let
       mktemp
     ];
 
-    excludeShellChecks = [ "SC1091" ];
-
     text = ''
-      bucket="$(cat "${backupConfigFile}" | grep 'bucket=' | sed 's/bucket \?= \?')"
-      prefix="$(cat "${backupConfigFile}" | grep 'prefix=' | sed 's/prefix \?= \?')"
+      configFile="$1"
+      s3cfg="$2"
+
+      bucket="$(cat "$configFile" | grep 'bucket=' | sed 's/bucket \?= \?')"
+      prefix="$(cat "$configFile" | grep 'prefix=' | sed 's/prefix \?= \?')"
 
       s3Dir="s3://$bucket/\$\{prefix}misskey-$(date --iso-8601)"
       echo "Uploading backups to '$s3Dir'"
@@ -35,7 +36,7 @@ let
       function upload () {
         name="$1"
 
-        s3cmd put --config "${s3Cfg}" - "$s3Dir/$name"
+        s3cmd put --config "$s3cfg" - "$s3Dir/$name"
       }
 
       echo "Uploading config"
@@ -62,7 +63,7 @@ in {
     enable = true;
     systemCronJobs = [
       # run every monday at ass in the morning, EST"
-      "0 8 0 0 1 ${user} ${backupScript}"
+      "0 8 0 0 1 ${user} ${backupScript} ${backupConfigFile} ${s3Cfg}"
     ];
   };
 }