From bd11ffd2677081870971e583b3ed69d3e2b468b9 Mon Sep 17 00:00:00 2001
From: Will Dietz <w@wdtz.org>
Date: Tue, 13 Feb 2018 14:11:17 -0600
Subject: [PATCH] ruby: don't reference groff if not being used (not used by
 default)

Fixes cross build by removing false dependency.

If this is needed again, be careful about *which* "groff" is needed.
(which in terms of build vs host)
---
 pkgs/development/interpreters/ruby/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/interpreters/ruby/default.nix b/pkgs/development/interpreters/ruby/default.nix
index a0c563e3fb2d..21a4433c9eb0 100644
--- a/pkgs/development/interpreters/ruby/default.nix
+++ b/pkgs/development/interpreters/ruby/default.nix
@@ -73,7 +73,7 @@ let
             unpackdir rubySrc;
 
         # Have `configure' avoid `/usr/bin/nroff' in non-chroot builds.
-        NROFF = "${groff}/bin/nroff";
+        NROFF = if docSupport then "${groff}/bin/nroff" else null;
 
         nativeBuildInputs =
              ops useRailsExpress [ autoreconfHook bison ]