* 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, 2 insertions, 2 deletions

diff --git a/scripts/nix-build.in b/scripts/nix-build.in
index f9d81b36c7a0..d9d1da73b12f 100644
--- a/scripts/nix-build.in
+++ b/scripts/nix-build.in
@@ -76,10 +76,10 @@ EOF
         $outLink = $ARGV[$n];
     }
 
-    elsif ($arg eq "--attr" or $arg eq "-A") {
+    elsif ($arg eq "--attr" or $arg eq "-A" or $arg eq "-I") {
         $n++;
         die "$0: `$arg' requires an argument\n" unless $n < scalar @ARGV;
-        push @instArgs, ("--attr", $ARGV[$n]);
+        push @instArgs, ($arg, $ARGV[$n]);
     }
 
     elsif ($arg eq "--arg" || $arg eq "--argstr") {