ilmbase, openexr: Use fetchurl

Also, enable parallel building.

(cherry picked from commit 6c06d7467edea0a5163aeb53f72750abcb044bbe)

pkgs/development/libraries/ilmbase/default.nix

@@ -1,13 +1,12 @@
-{ stdenv, openexr, automake, autoconf, libtool, which }:
+{ stdenv, fetchurl, automake, autoconf, libtool, which }:
 
-stdenv.mkDerivation {
-  name = "ilmbase-${openexr.source.version}";
+stdenv.mkDerivation rec {
+  name = "ilmbase-2.2.0";
 
-  src = openexr.source.src;
-
-  prePatch = ''
-    cd IlmBase
-  '';
+  src = fetchurl {
+    url = "http://download.savannah.nongnu.org/releases/openexr/${name}.tar.gz";
+    sha256 = "1izddjwbh1grs8080vmaix72z469qy29wrvkphgmqmcm0sv1by7c";
+  };
 
   preConfigure = ''
     ./bootstrap

pkgs/development/libraries/openexr/default.nix

@@ -1,25 +1,22 @@
-{ stdenv, callPackage, autoconf, automake, libtool, pkgconfig, zlib, ilmbase }:
-let
-  source = callPackage ./source.nix { };
-in
+{ lib, stdenv, fetchurl, autoconf, automake, libtool, pkgconfig, zlib, ilmbase }:
+
 stdenv.mkDerivation rec {
-  name = "openexr-${source.version}";
+  name = "openexr-${lib.getVersion ilmbase}";
 
-  src = source.src;
-
-  prePatch = ''
-    cd OpenEXR
-  '';
+  src = fetchurl {
+    url = "http://download.savannah.nongnu.org/releases/openexr/${name}.tar.gz";
+    sha256 = "0ca2j526n4wlamrxb85y2jrgcv0gf21b3a19rr0gh4rjqkv1581n";
+  };
 
   preConfigure = ''
     ./bootstrap
   '';
 
-  configureFlags = [ "--enable-imfexamples" ];
-  
   buildInputs = [ autoconf automake libtool pkgconfig ];
   propagatedBuildInputs = [ ilmbase zlib ];
 
+  enableParallelBuilding = true;
+
   patches = [ ./bootstrap.patch ];
 
   meta = with stdenv.lib; {
@@ -28,6 +25,4 @@ stdenv.mkDerivation rec {
     platforms = platforms.all;
     maintainers = with maintainers; [ wkennington ];
   };
-
-  passthru.source = source;
 }

pkgs/development/libraries/openexr/source.nix

@@ -1,11 +0,0 @@
-{ fetchFromGitHub }:
-rec {
-  version = "2.2.0";
-
-  src = fetchFromGitHub {
-    owner = "openexr";
-    repo = "openexr";
-    rev = "v${version}";
-    sha256 = "030vj2jk3n65x1wl0rmxzpl1bd5mzmld2lzn7sg92svpnghry6a8";
-  };
-}