From f2fcc163fa6c38566f3a78cd3757ab22f39821fc Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Mon, 17 Jun 2019 18:05:32 +0200
Subject: [PATCH] nix flake check: Warn about unknown flake outputs

---
 src/nix/flake.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/nix/flake.cc b/src/nix/flake.cc
index 6f6d1a0aa..8248a5d7b 100644
--- a/src/nix/flake.cc
+++ b/src/nix/flake.cc
@@ -365,6 +365,9 @@ struct CmdFlakeCheck : FlakeCommand, MixJSON
                         else if (name == "defaultApp")
                             checkApp(name, vProvide);
 
+                        else
+                            warn("unknown flake output '%s'", name);
+
                     } catch (Error & e) {
                         e.addPrefix(fmt("while checking flake output '" ANSI_BOLD "%s" ANSI_NORMAL "':\n", name));
                         throw;