From 6aebaa04276668c1c2126b8e4491f23293a64624 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9-Patrick=20Bubel?= <code@andre-bubel.de>
Date: Mon, 19 Nov 2018 14:09:33 +0100
Subject: [PATCH 1/3] nlopt: move version into the derivation itself

---
 pkgs/development/libraries/nlopt/default.nix | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/pkgs/development/libraries/nlopt/default.nix b/pkgs/development/libraries/nlopt/default.nix
index 48b7acf2896..bbbc818db63 100644
--- a/pkgs/development/libraries/nlopt/default.nix
+++ b/pkgs/development/libraries/nlopt/default.nix
@@ -1,13 +1,8 @@
 { fetchurl, stdenv, octave ? null, cmake }:
 
-let
-
-  version = "2.5.0";
-
-in
-
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   name = "nlopt-${version}";
+  version = "2.5.0";
 
   src = fetchurl {
     url = "https://github.com/stevengj/nlopt/archive/v${version}.tar.gz";

From d9a02b82d9af2972fabc4f6ae2d90c1f3dcc6110 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9-Patrick=20Bubel?= <code@andre-bubel.de>
Date: Mon, 19 Nov 2018 14:09:41 +0100
Subject: [PATCH 2/3] slic3r-prusa3d: fix sha256 for version 1.41.1

The release tag was updated a few days after the initial release.
---
 pkgs/applications/misc/slic3r/prusa3d.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/applications/misc/slic3r/prusa3d.nix b/pkgs/applications/misc/slic3r/prusa3d.nix
index cc9133257a0..445d996f605 100644
--- a/pkgs/applications/misc/slic3r/prusa3d.nix
+++ b/pkgs/applications/misc/slic3r/prusa3d.nix
@@ -114,7 +114,7 @@ stdenv.mkDerivation rec {
   src = fetchFromGitHub {
     owner = "prusa3d";
     repo = "Slic3r";
-    sha256 = "0068wwsjwmnxql7653vy3labcyslzf17kr8xdr4lg2jplm022hvy";
+    sha256 = "0crjrll8cjpkllval6abrqzvzp8g3rnb4vmwi5vivw0jvdv3w5y7";
     rev = "version_${version}";
   };
 

From 59ba6a3e2b2b4bfc77e60f6cdd1c49b8eef7a745 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9-Patrick=20Bubel?= <code@andre-bubel.de>
Date: Mon, 19 Nov 2018 14:09:52 +0100
Subject: [PATCH 3/3] slic3r-prusa3d: patch lib name for newer nlopt versions

The upgrade to version 2.5.0 of nlopt broke building of slic3r-prusa3d
because the C++ version of the nlopt lib is now integrated into
`libnlopt`.
---
 pkgs/applications/misc/slic3r/prusa3d.nix | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkgs/applications/misc/slic3r/prusa3d.nix b/pkgs/applications/misc/slic3r/prusa3d.nix
index 445d996f605..2f5486a0f4b 100644
--- a/pkgs/applications/misc/slic3r/prusa3d.nix
+++ b/pkgs/applications/misc/slic3r/prusa3d.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, makeWrapper, which, cmake, perl, perlPackages,
+{ stdenv, lib, fetchFromGitHub, makeWrapper, which, cmake, perl, perlPackages,
   boost, tbb, wxGTK30, pkgconfig, gtk3, fetchurl, gtk2, libGLU,
   glew, eigen, curl, gtest, nlopt, pcre, xorg }:
 let
@@ -98,6 +98,10 @@ stdenv.mkDerivation rec {
     # seems to be the easiest way.
     sed -i "s|\''${PERL_VENDORARCH}|$out/lib/slic3r-prusa3d|g" xs/CMakeLists.txt
     sed -i "s|\''${PERL_VENDORLIB}|$out/lib/slic3r-prusa3d|g" xs/CMakeLists.txt
+  '' + lib.optionalString (lib.versionOlder "2.5" nlopt.version) ''
+    # Since version 2.5.0 of nlopt we need to link to libnlopt, as libnlopt_cxx
+    # now seems to be integrated into the main lib.
+    sed -i 's|nlopt_cxx|nlopt|g' xs/src/libnest2d/cmake_modules/FindNLopt.cmake
   '';
 
   postInstall = ''