From 67be78f1290184ab8ad4a9e54460ae0e2cce6f6f Mon Sep 17 00:00:00 2001
From: Will Dietz <w@wdtz.org>
Date: Sun, 7 Jan 2018 16:47:54 -0600
Subject: [PATCH] flex: patch around attempt to regen manpage, fix cross

---
 pkgs/development/tools/parsing/flex/default.nix | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/tools/parsing/flex/default.nix b/pkgs/development/tools/parsing/flex/default.nix
index 0b4312966114..0b4d8cbfc564 100644
--- a/pkgs/development/tools/parsing/flex/default.nix
+++ b/pkgs/development/tools/parsing/flex/default.nix
@@ -29,10 +29,11 @@ stdenv.mkDerivation rec {
   '';
 
   crossAttrs = {
-
     # disable tests which can't run on build machine
     postPatch = ''
-      substituteInPlace Makefile.in --replace "tests" " ";
+      substituteInPlace Makefile.in --replace "tests" " "
+
+      substituteInPlace doc/Makefile.am --replace 'flex.1: $(top_srcdir)/configure.ac' 'flex.1: '
     '';
 
     preConfigure = ''