* Add a Nix expression search path feature. Paths between angle

  brackets, e.g.

    import <nixpkgs/pkgs/lib>

  are resolved by looking them up relative to the elements listed in
  the search path.  This allows us to get rid of hacks like

    import "${builtins.getEnv "NIXPKGS_ALL"}/pkgs/lib"

  The search path can be specified through the ‘-I’ command-line flag
  and through the colon-separated ‘NIX_PATH’ environment variable,
  e.g.,

    $ nix-build -I /etc/nixos ...

  If a file is not found in the search path, an error message is
  lazily thrown.

1 files changed, 1 insertions, 0 deletions

diff --git a/tests/lang/dir4/a.nix b/tests/lang/dir4/a.nix
new file mode 100644
index 000000000000..170df520ab68
--- /dev/null
+++ b/tests/lang/dir4/a.nix
@@ -0,0 +1 @@
+"X"