diff --git a/features/support/env.rb b/features/support/env.rb
index 2f5f5e5f..996c79ba 100644
--- a/features/support/env.rb
+++ b/features/support/env.rb
@@ -1,11 +1,12 @@
 require 'fileutils'
+require 'posix-spawn'
 require 'rr'
 require 'test/unit'
 require 'time'
 
 JEKYLL_SOURCE_DIR = File.dirname(File.dirname(File.dirname(__FILE__)))
 TEST_DIR    = File.expand_path(File.join('..', '..', 'tmp', 'jekyll'), File.dirname(__FILE__))
-JEKYLL_PATH = File.join(File.dirname(__FILE__), '..', '..', 'bin', 'jekyll')
+JEKYLL_PATH = File.expand_path(File.join(File.dirname(__FILE__), '..', '..', 'bin', 'jekyll'))
 JEKYLL_COMMAND_OUTPUT_FILE = File.join(File.dirname(TEST_DIR), 'jekyll_output.txt')
 
 def source_dir(*files)
@@ -17,11 +18,12 @@ def jekyll_output_file
 end
 
 def jekyll_run_output
-  File.read(jekyll_output_file)
+  File.read(jekyll_output_file) if File.file?(jekyll_output_file)
 end
 
 def run_jekyll(args)
-  system "#{JEKYLL_PATH} #{args} --trace > #{jekyll_output_file} 2>&1"
+  child = POSIX::Spawn::Child.new JEKYLL_PATH, *args.strip.split(' '), "--trace", :out => [JEKYLL_COMMAND_OUTPUT_FILE, "w"]
+  child.status.exitstatus == 0
 end
 
 def slug(title)