[error]freebsd install laravel5.1 elixir

gistfile1.txt

> node-sass@3.2.0 install /.amd_mnt/account/users/node_modules/laravel-elixir/node_modules/gulp-sass/node_modules/node-sass
> node scripts/install.js

Cannot download "https://github.com/sass/node-sass/releases/download/v3.2.0/freebsd-x64-0x000C_binding.node": HTTP error 404

> node-sass@3.2.0 postinstall /.amd_mnt/account/users/node_modules/laravel-elixir/node_modules/gulp-sass/node_modules/node-sass
> node scripts/build.js

Building: /.amd_mnt/account/users/bin/node node_modules/pangyp/bin/node-gyp rebuild --libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library=
gmake: Entering directory '/.amd_mnt/account/users/node_modules/laravel-elixir/node_modules/gulp-sass/node_modules/node-sass/build'
  CXX(target) Release/obj.target/libsass/src/libsass/ast.o
cc1plus: error: unrecognized command line option "-std=c++0x"
src/libsass.target.mk:127: recipe for target 'Release/obj.target/libsass/src/libsass/ast.o' failed
gmake: *** [Release/obj.target/libsass/src/libsass/ast.o] Error 1
gmake: Leaving directory '/.amd_mnt/account/users/node_modules/laravel-elixir/node_modules/gulp-sass/node_modules/node-sass/build'
gyp ERR! build error
gyp ERR! stack Error: `gmake` failed with exit code: 2