From 02bae3913260296447fe80ffb44276f48239e317 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Thu, 1 Sep 2016 15:47:11 +0200
Subject: [PATCH] tcl: Don't install a copy of tzdata

This cuts about 3 MiB from the installed size. On Linux, the configure
script is supposed to detect that installing tzdata is unnecessary,
but it looks in locations like /usr/share/zoneinfo.
---
 pkgs/development/interpreters/tcl/generic.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/development/interpreters/tcl/generic.nix b/pkgs/development/interpreters/tcl/generic.nix
index eafffba4a34f..3bf4ba2dc2f0 100644
--- a/pkgs/development/interpreters/tcl/generic.nix
+++ b/pkgs/development/interpreters/tcl/generic.nix
@@ -17,6 +17,10 @@ stdenv.mkDerivation rec {
   preConfigure = ''
     # Note: using $out instead of $man to prevent a runtime dependency on $man.
     configureFlagsArray+=(--mandir=$out/share/man --enable-man-symlinks)
+
+    # Don't install tzdata because NixOS already has a more up-to-date copy.
+    configureFlagsArray+=(--with-tzdata=no)
+
     cd unix
   '';