From 5864baa4c6306b1922dc3ca88db1813d5136dadf Mon Sep 17 00:00:00 2001
From: Chris Hodapp <hodapp87@gmail.com>
Date: Thu, 20 Apr 2017 14:31:37 -0400
Subject: [PATCH] mapnik: add optional PostgreSQL dependency

Closes #25063.
---
 pkgs/development/libraries/mapnik/default.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/development/libraries/mapnik/default.nix b/pkgs/development/libraries/mapnik/default.nix
index 661e1270e7f..4bd89df1581 100644
--- a/pkgs/development/libraries/mapnik/default.nix
+++ b/pkgs/development/libraries/mapnik/default.nix
@@ -1,6 +1,9 @@
 { stdenv, fetchzip
 , boost, cairo, freetype, gdal, harfbuzz, icu, libjpeg, libpng, libtiff
 , libwebp, libxml2, proj, python2, scons, sqlite, zlib
+
+# supply a postgresql package to enable the PostGIS input plugin
+, postgresql ? null
 }:
 
 stdenv.mkDerivation rec {
@@ -21,6 +24,9 @@ stdenv.mkDerivation rec {
   buildInputs =
     [ boost cairo freetype gdal harfbuzz icu libjpeg libpng libtiff
       libwebp libxml2 proj python2 sqlite zlib
+
+      # optional inputs
+      postgresql
     ];
 
   configurePhase = ''