From 6758d157d23dfb548d43c896a6f9092039684517 Mon Sep 17 00:00:00 2001
From: Joachim Fasting <joachifm@fastmail.fm>
Date: Mon, 19 Dec 2016 14:31:06 +0100
Subject: [PATCH 1/3] multipath-tools: ensure gzip does not capture timestamp

gzip is originally called as 'gzip -9 -c'

This is a port of
https://github.com/NixOS/nixpkgs/pull/2281/commits/a8e7ddd1dfaae4b3ce97fdefe4614a3e31c04501

Note that it does not seem to make a difference to `nix-build --check`.
---
 pkgs/os-specific/linux/multipath-tools/default.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/os-specific/linux/multipath-tools/default.nix b/pkgs/os-specific/linux/multipath-tools/default.nix
index f60ece0fcec..0e0178e8845 100644
--- a/pkgs/os-specific/linux/multipath-tools/default.nix
+++ b/pkgs/os-specific/linux/multipath-tools/default.nix
@@ -15,6 +15,8 @@ stdenv.mkDerivation rec {
     ' libmultipath/defaults.h
     sed -i -e 's,\$(DESTDIR)/\(usr/\)\?,$(prefix)/,g' \
       kpartx/Makefile libmpathpersist/Makefile
+    sed -i -e "s,GZIP = .*, GZIP = gzip -9n -c," \
+      Makefile.inc
   '';
 
   nativeBuildInputs = [ gzip ];

From 8246a845b43035b8715c7c2bf4a7341805eee00e Mon Sep 17 00:00:00 2001
From: Joachim Fasting <joachifm@fastmail.fm>
Date: Mon, 19 Dec 2016 14:34:53 +0100
Subject: [PATCH 2/3] zerotierone: gzip -9 -> gzip -9n

Note that it does not seem to make a difference to `nix-build --check`.
---
 pkgs/tools/networking/zerotierone/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/tools/networking/zerotierone/default.nix b/pkgs/tools/networking/zerotierone/default.nix
index ba41fcdd687..d97a6049745 100644
--- a/pkgs/tools/networking/zerotierone/default.nix
+++ b/pkgs/tools/networking/zerotierone/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
     mkdir -p $man/share/man/man8
     for cmd in zerotier-one.8 zerotier-cli.1 zerotier-idtool.1; do
-      cat doc/$cmd | gzip -9 > $man/share/man/man8/$cmd.gz
+      cat doc/$cmd | gzip -9n > $man/share/man/man8/$cmd.gz
     done
   '';
 

From a34eae0ecb939f3ec8e04b5f98830a3deec06065 Mon Sep 17 00:00:00 2001
From: Joachim Fasting <joachifm@fastmail.fm>
Date: Mon, 19 Dec 2016 14:35:01 +0100
Subject: [PATCH 3/3] stun: gzip -9 -> gzip -9n

Note that it does not seem to make a difference to `nix-build --check`.
---
 pkgs/tools/networking/stun/default.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/tools/networking/stun/default.nix b/pkgs/tools/networking/stun/default.nix
index 3eade48a614..8f9636041ff 100644
--- a/pkgs/tools/networking/stun/default.nix
+++ b/pkgs/tools/networking/stun/default.nix
@@ -20,8 +20,8 @@ stdenv.mkDerivation rec {
 
   preBuild = ''
     tar Jxvf ${srcManpages} debian/manpages
-    gzip -9 debian/manpages/stun.1
-    gzip -9 debian/manpages/stund.8
+    gzip -9n debian/manpages/stun.1
+    gzip -9n debian/manpages/stund.8
   '';
 
   installPhase = ''