当我运行以下命令尝试安装meanjs时：
~/Downloads/mean$ npm install
我遇到以下错误：
gyp verb build dir attempting to create "build" dir: /home/arif/Downloads/mean/node_modules/node-sass/build gyp ERR! configure error gyp ERR! stack Error: EACCES: permission denied, mkdir '/home/arif/Downloads/mean/node_modules/node-sass/build' gyp ERR! System Linux 5.0.0-32-generic gyp ERR! command "/usr/bin/node" "/home/arif/Downloads/mean/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library=" gyp ERR! cwd /home/arif/Downloads/mean/node_modules/node-sass gyp ERR! node -v v11.15.0 gyp ERR! node-gyp -v v3.8.0 gyp ERR! not ok Build failed with error code: 1 npm WARN ajv-keywords@2.1.1 requires a peer of ajv@^5.0.0 but none is installed. You must install peer dependencies yourself. npm WARN eslint-config-airbnb@6.0.2 requires a peer of eslint@^2.2.0 but none is installed. You must install peer dependencies yourself. npm WARN eslint-config-airbnb@6.0.2 requires a peer of eslint-plugin-react@^4.0.0 but none is installed. You must install peer dependencies yourself. npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.2 (node_modules/fsevents): npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"}) npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modules/gulp-nodemon/node_modules/fsevents): npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"}) npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.9 (node_modules/glob-watcher/node_modules/fsevents): npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.9: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"}) npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! node-sass@4.12.0 postinstall: `node scripts/build.js` npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the node-sass@4.12.0 postinstall 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! /home/arif/.npm/_logs/2019-11-11T09_44_26_049Z-debug.log
我做错了什么，该如何解决？