lib/fig/environment.rb in fig-0.1.59 vs lib/fig/environment.rb in fig-0.1.61

@@ -289,14 +289,15 @@
       return package_substituted.gsub(%r< \\ ([\\@]) >x, '\1')
     end
 
     def expand_named_package_references(arg)
       return arg.gsub(
+        # TODO: Refactor package name regex into PackageDescriptor constant.
         %r<
           (?: ^ | \G)           # Zero-width anchor.
           ( [^\\@]* (?:\\{2})*) # An even number of leading backslashes
           \@                    # The package indicator
-          ( [a-zA-Z0-9.-]+ )    # Package name
+          ( [a-zA-Z0-9_.-]+ )   # Package name
         >x
       ) do |match|
         backslashes = $1 || ''
         package = get_package($2)
         if package.nil?