using "nixtmpdir" as artifact dirname

src/Argonix.hs

@@ -258,7 +258,7 @@ setupSystem sa = do
   vshell "sudo rm -rf nixtmpdir" empty >>= \case
     ExitSuccess   -> printInfo "removed ./result"
     ExitFailure n -> die ("Failed to remove ./result " <> repr n)
-  liftIO $ createAndSetTMPDIR "tmpdirname"
+  liftIO $ createAndSetTMPDIR "nixtmpdir"
   doVerbose $ printInfo "running nix-build for the containers attribute."
   doVerbose $ printCommand $ "nix-build " <> pack
     (unwords (nixArguments "containers" sa))