v8: build with gyp.

The scons build has been deprecated

pkgs/development/libraries/v8/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchsvn, python, scons, readline, makeWrapper }:
+{ stdenv, fetchsvn, gyp, readline, python }:
 
 assert readline != null;
 
@@ -7,7 +7,9 @@ let
   arch = if system == "i686-linux" then "ia32" else if system == "x86_64-linux" || system == "x86_64-darwin" then "x64" else "";
   version = "3.11.10.15";
 in
+
 assert arch != "";
+
 stdenv.mkDerivation rec {
     name = "v8-${version}";
     src = fetchsvn {
@@ -15,22 +17,26 @@ stdenv.mkDerivation rec {
       sha256 = "0pdw4r6crsb07gshww4kbfbavxgkal8yaxkaggnkz62lrwbcwrwi";
     };
 
-    buildInputs = [python scons readline makeWrapper];
-
-    buildPhase = ''
-      export CXX=`type -p g++`
-      export CPPPATH=${readline}/include
-      export LIBPATH=${readline}/lib
-      scons snapshot=on console=readline library=shared importenv=PATH arch=${arch} library d8
+    configurePhase = ''
+      mkdir build/gyp
+      ln -sv ${gyp}/bin/gyp build/gyp/gyp
     '';
 
+    buildInputs = [ readline python ];
+
+    buildFlags = [
+      "library=shared"
+      "console=readline"
+      "${arch}.release"
+    ];
+
+    enableParallelBuilding = true;
+
     installPhase = ''
       mkdir -p $out/bin
       mkdir -p $out/lib
-
-      cp -v libv8.* $out/lib
-      cp -v d8 $out/bin/d8
-      cp -vR include $out/
-      wrapProgram $out/bin/d8 --set ${if stdenv.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH"} $out/lib
+      mv -v out/${arch}.release/d8 $out/bin
+      mv -v out/${arch}.release/lib.target/libv8.so $out/lib
+      mv -v include $out/
     '';
 }

pkgs/top-level/all-packages.nix

@@ -5004,7 +5004,7 @@ let
     inherit (gnome) libsoup;
   };
 
-  v8 = callPackage ../development/libraries/v8 { };
+  v8 = callPackage ../development/libraries/v8 { inherit (pythonPackages) gyp; };
 
   xalanj = xalanJava;
   xalanJava = callPackage ../development/libraries/java/xalanj {