test-npm-install failing on freebsd 10/11

[Trott]

test-npm-install is currently failing consistently on freebsd11-x64 in CI.

Example failure: https://ci.nodejs.org/job/node-test-commit-freebsd/4792/nodes=freebsd11-x64/console

not ok 737 parallel/test-npm-install
# 
# assert.js:85
#   throw new assert.AssertionError({
#   ^
# AssertionError: npm install should run without an error
#     at ChildProcess.handleExit (/usr/home/iojs/build/workspace/node-test-commit-freebsd/nodes/freebsd11-x64/test/parallel/test-npm-install.js:48:10)
#     at ChildProcess.<anonymous> (/usr/home/iojs/build/workspace/node-test-commit-freebsd/nodes/freebsd11-x64/test/common.js:422:15)
#     at emitTwo (events.js:106:13)
#     at ChildProcess.emit (events.js:191:7)
#     at Process.ChildProcess._handle.onexit (internal/child_process.js:215:12)
  ---
  duration_ms: 2.45

/cc @thealphanerd @nodejs/testing

[Trott]

It's a permissions issue.

[iojs@test-digitalocean-freebsd11-x64-1 ~/build/workspace/node-test-commit-freebsd/nodes/freebsd11-x64/test/tmp]$ ../../node ../../deps/npm/bin/npm-cli.js install
npm ERR! tar.pack Could not write /home/iojs/.npm/package-name/1.2.3/package.tgz
npm ERR! addLocalDirectory Could not pack /home/iojs/build/workspace/node-test-commit-freebsd/nodes/freebsd11-x64/test/fixtures/packages/main to /home/iojs/.npm/package-name/1.2.3/package.tgz
npm ERR! addLocal Could not install /home/iojs/build/workspace/node-test-commit-freebsd/nodes/freebsd11-x64/test/fixtures/packages/main
npm ERR! FreeBSD 11.0-RELEASE-p1
npm ERR! argv "/usr/home/iojs/build/workspace/node-test-commit-freebsd/nodes/freebsd11-x64/out/Release/node" "/usr/home/iojs/build/workspace/node-test-commit-freebsd/nodes/freebsd11-x64/deps/npm/bin/npm-cli.js" "install"
npm ERR! node v7.0.0-pre
npm ERR! npm  v3.10.8
npm ERR! path /home/iojs/.npm/package-name/1.2.3/package.tgz.4069004711
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall open

npm ERR! Error: EACCES: permission denied, open '/home/iojs/.npm/package-name/1.2.3/package.tgz.4069004711'
npm ERR!  { Error: EACCES: permission denied, open '/home/iojs/.npm/package-name/1.2.3/package.tgz.4069004711'
npm ERR!   errno: -13,
npm ERR!   code: 'EACCES',
npm ERR!   syscall: 'open',
npm ERR!   path: '/home/iojs/.npm/package-name/1.2.3/package.tgz.4069004711' }
npm ERR! 
npm ERR! Please try running this command again as root/Administrator.

npm ERR! Please include the following file with any support request:
npm ERR!     /usr/home/iojs/build/workspace/node-test-commit-freebsd/nodes/freebsd11-x64/test/tmp/npm-debug.log
[iojs@test-digitalocean-freebsd11-x64-1 ~/build/workspace/node-test-commit-freebsd/nodes/freebsd11-x64/test/tmp]$

[joaocgreis]

Proposed solution: #9079

[jbergstroem]

The problem was that jenkins slave ran as root prior. I've adjusted permissions but I'd still like to see #9079 land.