From ac782ae4e01a32dc375976d67db3c1fe71bd6701 Mon Sep 17 00:00:00 2001
From: Ryan Mulligan <ryan@ryantm.com>
Date: Fri, 23 Feb 2018 09:50:33 -0800
Subject: [PATCH] mattermost: add build number

---
 pkgs/servers/mattermost/default.nix | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/pkgs/servers/mattermost/default.nix b/pkgs/servers/mattermost/default.nix
index bff973d786a1..f0c1a0fcec55 100644
--- a/pkgs/servers/mattermost/default.nix
+++ b/pkgs/servers/mattermost/default.nix
@@ -1,8 +1,13 @@
 { stdenv, fetchurl, fetchFromGitHub, buildGoPackage }:
 
+let
+  version = "4.7.2";
+  goPackagePath = "github.com/mattermost/mattermost-server";
+  buildFlags = "-ldflags \"-X '${goPackagePath}/model.BuildNumber=nixpkgs-${version}'\"";
+in
+
 buildGoPackage rec {
   name = "mattermost-${version}";
-  version = "4.7.2";
 
   src = fetchFromGitHub {
     owner = "mattermost";
@@ -16,12 +21,12 @@ buildGoPackage rec {
     sha256 = "14gr7zzx77q862qccjcdwrzd6n8g2z8yngw8aa4g3q6hypsqi4v3";
   };
 
-  goPackagePath = "github.com/mattermost/mattermost-server";
+  inherit goPackagePath;
 
   buildPhase = ''
     runHook preBuild
     cd go/src/${goPackagePath}/cmd/platform
-    go install
+    go install ${buildFlags}
     runHook postBuild
   '';
 
@@ -35,7 +40,7 @@ buildGoPackage rec {
   '';
 
   meta = with stdenv.lib; {
-    description = "Open-Source, self-hosted Slack-alternative";
+    description = "Open-source, self-hosted Slack-alternative";
     homepage = https://www.mattermost.org;
     license = with licenses; [ agpl3 asl20 ];
     maintainers = with maintainers; [ fpletz ryantm ];