From 48b888c800448e2dd0577f6d33e0118d8d98301d Mon Sep 17 00:00:00 2001
From: Daiderd Jordan <daiderd@gmail.com>
Date: Sun, 7 Jan 2018 00:06:53 +0100
Subject: [PATCH] nixpkgs: add test for overlays

---
 release.nix                |  1 +
 tests/nixpkgs-overlays.nix | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)
 create mode 100644 tests/nixpkgs-overlays.nix

diff --git a/release.nix b/release.nix
index df35a0bf..479f18c1 100644
--- a/release.nix
+++ b/release.nix
@@ -92,6 +92,7 @@ let
     tests.environment-path = makeTest ./tests/environment-path.nix;
     tests.launchd-setenv = makeTest ./tests/launchd-setenv.nix;
     tests.networking = makeTest ./tests/networking.nix;
+    tests.nixpkgs-overlays = makeTest ./tests/nixpkgs-overlays.nix;
     tests.services-activate-system = makeTest ./tests/services-activate-system.nix;
     tests.system-defaults-write = makeTest ./tests/system-defaults-write.nix;
     tests.system-packages = makeTest ./tests/system-packages.nix;
diff --git a/tests/nixpkgs-overlays.nix b/tests/nixpkgs-overlays.nix
new file mode 100644
index 00000000..aa03bf11
--- /dev/null
+++ b/tests/nixpkgs-overlays.nix
@@ -0,0 +1,16 @@
+{ config, pkgs, ... }:
+
+{
+  nixpkgs.overlays = [
+    (self: super:
+    {
+      hello = super.runCommand "hello" {} "mkdir $out";
+    })
+  ];
+
+  test = ''
+    echo checking /bin/hello >&2
+    ! ${pkgs.hello}/bin/hello
+  '';
+}
+