npm ci failes with errno -4048

[darcyclarke]

  Original bug ticket: [https://npm.community/t/10556](https://npm.community/t/10556)
  Originally filed: 2019-10-15T18:53:13.181Z

[mwpowellhtx]

Similar error here, ran npm install with the following results. Paths changed to protect the innocent.

20074 warn enoent SKIPPING OPTIONAL DEPENDENCY: ENOENT: no such file or directory, rename 'X:\path\to\node_modules\.staging\fsevents-9b7ff08e\node_modules\abbrev' -> 'X:\path\to\node_modules\.staging\abbrev-dbad1e86'
20075 verbose enoent SKIPPING OPTIONAL DEPENDENCY: This is related to npm not being able to find a file.
20075 verbose enoent SKIPPING OPTIONAL DEPENDENCY:
20076 verbose stack Error: EPERM: operation not permitted, unlink 'X:\path\to\node_modules\.staging\typescript-87f3ef63\lib\tsserver.js'
20077 verbose cwd X:\path\to
20078 verbose Windows_NT 10.0.19041
20079 verbose argv "C:\\Dev\\nodejs\\node.exe" "C:\\Dev\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "install"
20080 verbose node v12.17.0
20081 verbose npm  v6.14.4
20082 error code EPERM
20083 error syscall unlink
20084 error path X:\path\to\node_modules\.staging\typescript-87f3ef63\lib\tsserver.js
20085 error errno -4048
20086 error Error: EPERM: operation not permitted, unlink 'X:\path\to\node_modules\.staging\typescript-87f3ef63\lib\tsserver.js'
20086 error  [OperationalError: EPERM: operation not permitted, unlink 'X:\path\to\node_modules\.staging\typescript-87f3ef63\lib\tsserver.js'] {
20086 error   cause: [Error: EPERM: operation not permitted, unlink 'X:\path\to\node_modules\.staging\typescript-87f3ef63\lib\tsserver.js'] {
20086 error     errno: -4048,
20086 error     code: 'EPERM',
20086 error     syscall: 'unlink',
20086 error     path: 'X:\\path\\to\\node_modules\\.staging\\typescript-87f3ef63\\lib\\tsserver.js'
20086 error   },
20086 error   errno: -4048,
20086 error   code: 'EPERM',
20086 error   syscall: 'unlink',
20086 error   path: 'X:\\path\\to\\node_modules\\.staging\\typescript-87f3ef63\\lib\\tsserver.js',
20086 error   parent: 'Planner.Web.Client'
20086 error }
20087 error The operation was rejected by your operating system.
20087 error It's possible that the file was already in use (by a text editor or antivirus),
20087 error or that you lack permissions to access it.
20087 error
20087 error If you believe this might be a permissions issue, please double-check the
20087 error permissions of the file and its containing directories, or try running
20087 error the command again as root/Administrator.
20088 verbose exit [ -4048, true ]

All the guidance I read is "run in elevated" or "administrator" mode, which I am, through an administrator command prompt. So that is not the issue.

Running under Windows 10 Pro version 2004 build 19041 (x64).

[mwpowellhtx]

For me, closing Visual Studio might have been the resolution here.