From 3c304fd1c9bdb1faafc0060cf9eb46058d000bc0 Mon Sep 17 00:00:00 2001
From: Guillaume Bouchard <guillaume.bouchard@tweag.io>
Date: Tue, 7 May 2019 14:02:44 +0200
Subject: [PATCH] Fix out of bound error

Some lines from nix-build output does not contains 3 words, leading to
out of bound.

Closes #79
---
 nixpkgs/nixpkgs.bzl | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/nixpkgs/nixpkgs.bzl b/nixpkgs/nixpkgs.bzl
index ba5714eaf..007856996 100644
--- a/nixpkgs/nixpkgs.bzl
+++ b/nixpkgs/nixpkgs.bzl
@@ -174,6 +174,10 @@ def _nixpkgs_package_impl(repository_ctx):
         for line in exec_result.stderr.splitlines():
             line = line.split(sep=' ')
 
+            # Interesting lines contains at least 3 words
+            if len(line) < 3:
+                continue
+
             # Heuristic: a dependency is something which looks like:
             # evaluating file FILE
             # copied source FILE