From 09fed91ec8e084c4cdfd9e2363d65e8bb7c48091 Mon Sep 17 00:00:00 2001
From: Matthew Bauer <matthew.bauer@obsidian.systems>
Date: Fri, 20 Jul 2018 22:02:00 -0400
Subject: [PATCH] file: build on windows

---
 pkgs/tools/misc/file/default.nix | 7 +++++--
 pkgs/top-level/all-packages.nix  | 4 +++-
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/pkgs/tools/misc/file/default.nix b/pkgs/tools/misc/file/default.nix
index aeb43d7c1151..485f46d03144 100644
--- a/pkgs/tools/misc/file/default.nix
+++ b/pkgs/tools/misc/file/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, file, zlib }:
+{ stdenv, fetchurl, file, zlib, libgnurx }:
 
 stdenv.mkDerivation rec {
   name = "file-${version}";
@@ -13,10 +13,13 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = stdenv.lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) file;
-  buildInputs = [ zlib ];
+  buildInputs = [ zlib ]
+              ++ stdenv.lib.optional stdenv.hostPlatform.isWindows libgnurx;
 
   doCheck = true;
 
+  makeFlags = if stdenv.hostPlatform.isWindows then "FILE_COMPILE=file"
+              else null;
 
   meta = with stdenv.lib; {
     homepage = http://darwinsys.com/file;
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index de255678ca29..5c0e1ddb26e8 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2387,7 +2387,9 @@ with pkgs;
 
   figlet = callPackage ../tools/misc/figlet { };
 
-  file = callPackage ../tools/misc/file { };
+  file = callPackage ../tools/misc/file {
+    inherit (windows) libgnurx;
+  };
 
   filegive = callPackage ../tools/networking/filegive { };