title: EACCES: permission denied, mkdir '/node_modules/node-sass/build' while running npm install on ubuntu
body: <p>i have an angular 4 app and i want to run it on ubuntu. i copied all project files , package.json and package-lock.json to a folder in winscp but i didn't copy node_modules! now when i run npm install, i get the errors like this:</p>
  
  <pre><code>&gt; node-sass@4.7.2 install /home/ubuntu/cms/node_modules/@angular/cli/node_modules/node-sass
  &gt; node scripts/install.js
  
  Unable to save binary /home/ubuntu/cms/node_modules/@angular/cli/node_modules/node-sass/vendor/linux-x64-57 : { Error: EACCES: permission denied, mkdir '/home/ubuntu/cms/node_modules/@angular/cli/node_modules/node-sass/vendor'
      at Object.fs.mkdirSync (fs.js:885:18)
      at sync (/home/ubuntu/cms/node_modules/mkdirp/index.js:71:13)
      at Function.sync (/home/ubuntu/cms/node_modules/mkdirp/index.js:77:24)
      at checkAndDownloadBinary (/home/ubuntu/cms/node_modules/@angular/cli/node_modules/node-sass/scripts/install.js:111:11)
      at Object.&lt;anonymous&gt; (/home/ubuntu/cms/node_modules/@angular/cli/node_modules/node-sass/scripts/install.js:154:1)
      at Module._compile (module.js:643:30)
      at Object.Module._extensions..js (module.js:654:10)
      at Module.load (module.js:556:32)
      at tryModuleLoad (module.js:499:12)
      at Function.Module._load (module.js:491:3)
    errno: -13,
    code: 'EACCES',
    syscall: 'mkdir',
    path: '/home/ubuntu/cms/node_modules/@angular/cli/node_modules/node-sass/vendor' }
  
  &gt; node-sass@4.9.1 install /home/ubuntu/cms/node_modules/node-sass
  &gt; node scripts/install.js
  
  Unable to save binary /home/ubuntu/cms/node_modules/node-sass/vendor/linux-x64-57 : { Error: EACCES: permission denied, mkdir '/home/ubuntu/cms/node_modules/node-sass/vendor'
      at Object.fs.mkdirSync (fs.js:885:18)
      at sync (/home/ubuntu/cms/node_modules/mkdirp/index.js:71:13)
      at Function.sync (/home/ubuntu/cms/node_modules/mkdirp/index.js:77:24)
      at checkAndDownloadBinary (/home/ubuntu/cms/node_modules/node-sass/scripts/install.js:114:11)
      at Object.&lt;anonymous&gt; (/home/ubuntu/cms/node_modules/node-sass/scripts/install.js:157:1)
      at Module._compile (module.js:643:30)
      at Object.Module._extensions..js (module.js:654:10)
      at Module.load (module.js:556:32)
      at tryModuleLoad (module.js:499:12)
      at Function.Module._load (module.js:491:3)
    errno: -13,
    code: 'EACCES',
    syscall: 'mkdir',
    path: '/home/ubuntu/cms/node_modules/node-sass/vendor' }
  
  &gt; node-sass@4.7.2 postinstall /home/ubuntu/cms/node_modules/@angular/cli/node_modules/node-sass
  &gt; node scripts/build.js
  
  Building: /usr/bin/node /home/ubuntu/cms/node_modules/node-gyp/bin/node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library=
  gyp info it worked if it ends with ok
  gyp verb cli [ '/usr/bin/node',
  gyp verb cli   '/home/ubuntu/cms/node_modules/node-gyp/bin/node-gyp.js',
  gyp verb cli   'rebuild',
  gyp verb cli   '--verbose',
  gyp verb cli   '--libsass_ext=',
  gyp verb cli   '--libsass_cflags=',
  gyp verb cli   '--libsass_ldflags=',
  gyp verb cli   '--libsass_library=' ]
  gyp info using node-gyp@3.7.0
  gyp info using node@8.9.4 | linux | x64
  gyp verb command rebuild []
  gyp verb command clean []
  gyp verb clean removing "build" directory
  gyp verb command configure []
  gyp verb check python checking for Python executable "python2" in the PATH
  gyp verb `which` succeeded python2 /usr/bin/python2
  gyp verb check python version `/usr/bin/python2 -c "import platform; print(platform.python_version());"` returned: "2.7.12\n"
  gyp verb get node dir no --target version specified, falling back to host node version: 8.9.4
  gyp verb command install [ '8.9.4' ]
  gyp verb install input version string "8.9.4"
  gyp verb install installing version: 8.9.4
  gyp verb install --ensure was passed, so won't reinstall if already installed
  gyp verb install version is already installed, need to check "installVersion"
  gyp verb got "installVersion" 9
  gyp verb needs "installVersion" 9
  gyp verb install version is good
  gyp verb get node dir target node version installed: 8.9.4
  gyp verb build dir attempting to create "build" dir: /home/ubuntu/cms/node_modules/@angular/cli/node_modules/node-sass/build
  gyp ERR! configure error
  gyp ERR! stack Error: EACCES: permission denied, mkdir '/home/ubuntu/cms/node_modules/@angular/cli/node_modules/node-sass/build'
  gyp ERR! System Linux 4.4.0-124-generic
  gyp ERR! command "/usr/bin/node" "/home/ubuntu/cms/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
  gyp ERR! cwd /home/ubuntu/cms/node_modules/@angular/cli/node_modules/node-sass
  gyp ERR! node -v v8.9.4
  gyp ERR! node-gyp -v v3.7.0
  gyp ERR! not ok
  Build failed with error code: 1
  
  &gt; node-sass@4.9.1 postinstall /home/ubuntu/cms/node_modules/node-sass
  &gt; node scripts/build.js
  
  Building: /usr/bin/node /home/ubuntu/cms/node_modules/node-gyp/bin/node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library=
  gyp info it worked if it ends with ok
  gyp verb cli [ '/usr/bin/node',
  gyp verb cli   '/home/ubuntu/cms/node_modules/node-gyp/bin/node-gyp.js',
  gyp verb cli   'rebuild',
  gyp verb cli   '--verbose',
  gyp verb cli   '--libsass_ext=',
  gyp verb cli   '--libsass_cflags=',
  gyp verb cli   '--libsass_ldflags=',
  gyp verb cli   '--libsass_library=' ]
  gyp info using node-gyp@3.7.0
  gyp info using node@8.9.4 | linux | x64
  gyp verb command rebuild []
  gyp verb command clean []
  gyp verb clean removing "build" directory
  gyp verb command configure []
  gyp verb check python checking for Python executable "python2" in the PATH
  gyp verb `which` succeeded python2 /usr/bin/python2
  gyp verb check python version `/usr/bin/python2 -c "import platform; print(platform.python_version());"` returned: "2.7.12\n"
  gyp verb get node dir no --target version specified, falling back to host node version: 8.9.4
  gyp verb command install [ '8.9.4' ]
  gyp verb install input version string "8.9.4"
  gyp verb install installing version: 8.9.4
  gyp verb install --ensure was passed, so won't reinstall if already installed
  gyp verb install version is already installed, need to check "installVersion"
  gyp verb got "installVersion" 9
  gyp verb needs "installVersion" 9
  gyp verb install version is good
  gyp verb get node dir target node version installed: 8.9.4
  gyp verb build dir attempting to create "build" dir: /home/ubuntu/cms/node_modules/node-sass/build
  gyp ERR! configure error
  gyp ERR! stack Error: EACCES: permission denied, mkdir '/home/ubuntu/cms/node_modules/node-sass/build'
  gyp ERR! System Linux 4.4.0-124-generic
  gyp ERR! command "/usr/bin/node" "/home/ubuntu/cms/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
  gyp ERR! cwd /home/ubuntu/cms/node_modules/node-sass
  gyp ERR! node -v v8.9.4
  gyp ERR! node-gyp -v v3.7.0
  gyp ERR! not ok
  Build failed with error code: 1
  npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (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: node-sass@4.7.2 (node_modules/@angular/cli/node_modules/node-sass):
  npm WARN optional SKIPPING OPTIONAL DEPENDENCY: node-sass@4.7.2 postinstall: `node scripts/build.js`
  npm WARN optional SKIPPING OPTIONAL DEPENDENCY: Exit status 1
  
  npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! node-sass@4.9.1 postinstall: `node scripts/build.js`
  npm ERR! Exit status 1
  npm ERR!
  npm ERR! Failed at the node-sass@4.9.1 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/ubuntu/.npm/_logs/2018-07-07T10_49_32_298Z-debug.log
  </code></pre>
  
  <p>i did the steps that i said before to run my project, but i don't know whats going on here now? 
  i also did rm -rf node_modules, rm package-lock.json, npm cache clean --force and used npm install again but it's still not working! </p>