我正在尝试为我的源代码构建DXR。我没有从github复制DXR源代码，而是复制并使用了它。使用makefile构建dxr时，出现错误“ 503服务不可用”。
我正在使用here中的makefile进行构建
错误：
server:/users/naek/DXR/DXR_mozilla/dxr> make
cd tooling/node && npm install
> DXR@2.0.0 preinstall /users/nsekar/DXR/DXR_mozilla/dxr/tooling/node
> lockdown
NPM Lockdown is here to check your dependencies! Never fear!
using registry: registry.npmjs.org
> DXR@2.0.0 preinstall /users/nsekar/DXR/DXR_mozilla/dxr/tooling/node
> lockdown
npm ERR! code E503
npm ERR! 503 Service Unavailable: lockdown@0.0.6
npm ERR! A complete log of this run can be found in:
npm ERR! /users/naek/.npm/_logs/2019-01-24T12_18_51_517Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! DXR@2.0.0 preinstall: `lockdown`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the DXR@2.0.0 preinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /users/naek/.npm/_logs/2019-01-24T12_18_51_584Z-debug.log