README.md

Reproduction case for the error:

yarn install --ignore-optional
yarn install v1.2.0
[1/4] 🔍  Resolving packages...
[2/4] 🚚  Fetching packages...
[3/4] 🔗  Linking dependencies...
[4/4] 📃  Building fresh packages...
[1/1] ⠄ phantomjs-prebuilt
[-/1] ⠄ waiting...
[-/1] ⠄ waiting...
[-/1] ⠄ waiting...
error /Users/evanpurkhiser/Coding/yarn-repro-optional/node_modules/phantomjs-prebuilt: Command failed.
Exit code: 1
Command: node install.js
Arguments:
Directory: /Users/evanpurkhiser/Coding/yarn-repro-optional/node_modules/phantomjs-prebuilt
Output:
module.js:529
    throw err;
    ^

Error: Cannot find module 'assert-plus'
    at Function.Module._resolveFilename (module.js:527:15)
    at Function.Module._load (module.js:476:23)
    at Module.require (module.js:568:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (/Users/evanpurkhiser/Coding/yarn-repro-optional/node_modules/sshpk/lib/key.js:5:14)
    at Module._compile (module.js:624:30)
    at Object.Module._extensions..js (module.js:635:10)

Can be reproduced by running

yarn install --ignore-optional

package.json

{
  "name": "yarn-repro-optional",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "dependencies": {
    "less": "2.5.3",
    "phantomjs-prebuilt": "^2.1.15"
  }
}

yarn.lock

# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
# yarn lockfile v1


ajv@^4.9.1:
  version "4.11.8"
  resolved "https://registry.yarnpkg.com/ajv/-/ajv-4.11.8.tgz#82ffb02b29e662ae53bdc20af15947706739c536"
  dependencies:
    co "^4.6.0"
    json-stable-stringify "^1.0.1"

ajv@^5.1.0:
  version "5.2.3"
  resolved "https://registry.yarnpkg.com/ajv/-/ajv-5.2.3.tgz#c06f598778c44c6b161abafe3466b81ad1814ed2"
  dependencies:
    co "^4.6.0"
    fast-deep-equal "^1.0.0"
    json-schema-traverse "^0.3.0"
    json-stable-stringify "^1.0.1"

amdefine@>=0.0.4:
  version "1.0.1"
  resolved "https://registry.yarnpkg.com/amdefine/-/amdefine-1.0.1.tgz#4a5282ac164729e93619bcfd3ad151f817ce91f5"

asap@~1.0.0:
  version "1.0.0"
  resolved "https://registry.yarnpkg.com/asap/-/asap-1.0.0.tgz#b2a45da5fdfa20b0496fc3768cc27c12fa916a7d"

asn1@~0.2.3:
  version "0.2.3"
  resolved "https://registry.yarnpkg.com/asn1/-/asn1-0.2.3.tgz#dac8787713c9966849fc8180777ebe9c1ddf3b86"

assert-plus@1.0.0, assert-plus@^1.0.0:
  version "1.0.0"
  resolved "https://registry.yarnpkg.com/assert-plus/-/assert-plus-1.0.0.tgz#f12e0f3c5d77b0b1cdd9146942e4e96c1e4dd525"

assert-plus@^0.2.0:
  version "0.2.0"
  resolved "https://registry.yarnpkg.com/assert-plus/-/assert-plus-0.2.0.tgz#d74e1b87e7affc0db8aadb7021f3fe48101ab234"

asynckit@^0.4.0:
  version "0.4.0"
  resolved "https://registry.yarnpkg.com/asynckit/-/asynckit-0.4.0.tgz#c79ed97f7f34cb8f2ba1bc9790bcc366474b4b79"

aws-sign2@~0.6.0:
  version "0.6.0"
  resolved "https://registry.yarnpkg.com/aws-sign2/-/aws-sign2-0.6.0.tgz#14342dd38dbcc94d0e5b87d763cd63612c0e794f"

aws-sign2@~0.7.0:
  version "0.7.0"
  resolved "https://registry.yarnpkg.com/aws-sign2/-/aws-sign2-0.7.0.tgz#b46e890934a9591f2d2f6f86d7e6a9f1b3fe76a8"

aws4@^1.2.1, aws4@^1.6.0:
  version "1.6.0"
  resolved "https://registry.yarnpkg.com/aws4/-/aws4-1.6.0.tgz#83ef5ca860b2b32e4a0deedee8c771b9db57471e"

bcrypt-pbkdf@^1.0.0:
  version "1.0.1"
  resolved "https://registry.yarnpkg.com/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.1.tgz#63bc5dcb61331b92bc05fd528953c33462a06f8d"
  dependencies:
    tweetnacl "^0.14.3"

boom@2.x.x:
  version "2.10.1"
  resolved "https://registry.yarnpkg.com/boom/-/boom-2.10.1.tgz#39c8918ceff5799f83f9492a848f625add0c766f"
  dependencies:
    hoek "2.x.x"

boom@4.x.x:
  version "4.3.1"
  resolved "https://registry.yarnpkg.com/boom/-/boom-4.3.1.tgz#4f8a3005cb4a7e3889f749030fd25b96e01d2e31"
  dependencies:
    hoek "4.x.x"

boom@5.x.x:
  version "5.2.0"
  resolved "https://registry.yarnpkg.com/boom/-/boom-5.2.0.tgz#5dd9da6ee3a5f302077436290cb717d3f4a54e02"
  dependencies:
    hoek "4.x.x"

caseless@~0.12.0:
  version "0.12.0"
  resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.12.0.tgz#1b681c21ff84033c826543090689420d187151dc"

co@^4.6.0:
  version "4.6.0"
  resolved "https://registry.yarnpkg.com/co/-/co-4.6.0.tgz#6ea6bdf3d853ae54ccb8e47bfa0bf3f9031fb184"

combined-stream@^1.0.5, combined-stream@~1.0.5:
  version "1.0.5"
  resolved "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.5.tgz#938370a57b4a51dea2c77c15d5c5fdf895164009"
  dependencies:
    delayed-stream "~1.0.0"

concat-stream@1.6.0:
  version "1.6.0"
  resolved "https://registry.yarnpkg.com/concat-stream/-/concat-stream-1.6.0.tgz#0aac662fd52be78964d5532f694784e70110acf7"
  dependencies:
    inherits "^2.0.3"
    readable-stream "^2.2.2"
    typedarray "^0.0.6"

core-util-is@1.0.2, core-util-is@~1.0.0:
  version "1.0.2"
  resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"

cryptiles@2.x.x:
  version "2.0.5"
  resolved "https://registry.yarnpkg.com/cryptiles/-/cryptiles-2.0.5.tgz#3bdfecdc608147c1c67202fa291e7dca59eaa3b8"
  dependencies:
    boom "2.x.x"

cryptiles@3.x.x:
  version "3.1.2"
  resolved "https://registry.yarnpkg.com/cryptiles/-/cryptiles-3.1.2.tgz#a89fbb220f5ce25ec56e8c4aa8a4fd7b5b0d29fe"
  dependencies:
    boom "5.x.x"

dashdash@^1.12.0:
  version "1.14.1"
  resolved "https://registry.yarnpkg.com/dashdash/-/dashdash-1.14.1.tgz#853cfa0f7cbe2fed5de20326b8dd581035f6e2f0"
  dependencies:
    assert-plus "^1.0.0"

debug@2.2.0:
  version "2.2.0"
  resolved "https://registry.yarnpkg.com/debug/-/debug-2.2.0.tgz#f87057e995b1a1f6ae6a4960664137bc56f039da"
  dependencies:
    ms "0.7.1"

delayed-stream@~1.0.0:
  version "1.0.0"
  resolved "https://registry.yarnpkg.com/delayed-stream/-/delayed-stream-1.0.0.tgz#df3ae199acadfb7d440aaae0b29e2272b24ec619"

ecc-jsbn@~0.1.1:
  version "0.1.1"
  resolved "https://registry.yarnpkg.com/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz#0fc73a9ed5f0d53c38193398523ef7e543777505"
  dependencies:
    jsbn "~0.1.0"

errno@^0.1.1:
  version "0.1.4"
  resolved "https://registry.yarnpkg.com/errno/-/errno-0.1.4.tgz#b896e23a9e5e8ba33871fc996abd3635fc9a1c7d"
  dependencies:
    prr "~0.0.0"

es6-promise@~4.0.3:
  version "4.0.5"
  resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-4.0.5.tgz#7882f30adde5b240ccfa7f7d78c548330951ae42"

extend@~3.0.0, extend@~3.0.1:
  version "3.0.1"
  resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.1.tgz#a755ea7bc1adfcc5a31ce7e762dbaadc5e636444"

extract-zip@~1.6.5:
  version "1.6.5"
  resolved "https://registry.yarnpkg.com/extract-zip/-/extract-zip-1.6.5.tgz#99a06735b6ea20ea9b705d779acffcc87cff0440"
  dependencies:
    concat-stream "1.6.0"
    debug "2.2.0"
    mkdirp "0.5.0"
    yauzl "2.4.1"

extsprintf@1.3.0, extsprintf@^1.2.0:
  version "1.3.0"
  resolved "https://registry.yarnpkg.com/extsprintf/-/extsprintf-1.3.0.tgz#96918440e3041a7a414f8c52e3c574eb3c3e1e05"

fast-deep-equal@^1.0.0:
  version "1.0.0"
  resolved "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-1.0.0.tgz#96256a3bc975595eb36d82e9929d060d893439ff"

fd-slicer@~1.0.1:
  version "1.0.1"
  resolved "https://registry.yarnpkg.com/fd-slicer/-/fd-slicer-1.0.1.tgz#8b5bcbd9ec327c5041bf9ab023fd6750f1177e65"
  dependencies:
    pend "~1.2.0"

forever-agent@~0.6.1:
  version "0.6.1"
  resolved "https://registry.yarnpkg.com/forever-agent/-/forever-agent-0.6.1.tgz#fbc71f0c41adeb37f96c577ad1ed42d8fdacca91"

form-data@~2.1.1:
  version "2.1.4"
  resolved "https://registry.yarnpkg.com/form-data/-/form-data-2.1.4.tgz#33c183acf193276ecaa98143a69e94bfee1750d1"
  dependencies:
    asynckit "^0.4.0"
    combined-stream "^1.0.5"
    mime-types "^2.1.12"

form-data@~2.3.1:
  version "2.3.1"
  resolved "https://registry.yarnpkg.com/form-data/-/form-data-2.3.1.tgz#6fb94fbd71885306d73d15cc497fe4cc4ecd44bf"
  dependencies:
    asynckit "^0.4.0"
    combined-stream "^1.0.5"
    mime-types "^2.1.12"

fs-extra@~1.0.0:
  version "1.0.0"
  resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-1.0.0.tgz#cd3ce5f7e7cb6145883fcae3191e9877f8587950"
  dependencies:
    graceful-fs "^4.1.2"
    jsonfile "^2.1.0"
    klaw "^1.0.0"

getpass@^0.1.1:
  version "0.1.7"
  resolved "https://registry.yarnpkg.com/getpass/-/getpass-0.1.7.tgz#5eff8e3e684d569ae4cb2b1282604e8ba62149fa"
  dependencies:
    assert-plus "^1.0.0"

graceful-fs@^3.0.5:
  version "3.0.11"
  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-3.0.11.tgz#7613c778a1afea62f25c630a086d7f3acbbdd818"
  dependencies:
    natives "^1.1.0"

graceful-fs@^4.1.2, graceful-fs@^4.1.6, graceful-fs@^4.1.9:
  version "4.1.11"
  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.11.tgz#0e8bdfe4d1ddb8854d64e04ea7c00e2a026e5658"

har-schema@^1.0.5:
  version "1.0.5"
  resolved "https://registry.yarnpkg.com/har-schema/-/har-schema-1.0.5.tgz#d263135f43307c02c602afc8fe95970c0151369e"

har-schema@^2.0.0:
  version "2.0.0"
  resolved "https://registry.yarnpkg.com/har-schema/-/har-schema-2.0.0.tgz#a94c2224ebcac04782a0d9035521f24735b7ec92"

har-validator@~4.2.1:
  version "4.2.1"
  resolved "https://registry.yarnpkg.com/har-validator/-/har-validator-4.2.1.tgz#33481d0f1bbff600dd203d75812a6a5fba002e2a"
  dependencies:
    ajv "^4.9.1"
    har-schema "^1.0.5"

har-validator@~5.0.3:
  version "5.0.3"
  resolved "https://registry.yarnpkg.com/har-validator/-/har-validator-5.0.3.tgz#ba402c266194f15956ef15e0fcf242993f6a7dfd"
  dependencies:
    ajv "^5.1.0"
    har-schema "^2.0.0"

hasha@~2.2.0:
  version "2.2.0"
  resolved "https://registry.yarnpkg.com/hasha/-/hasha-2.2.0.tgz#78d7cbfc1e6d66303fe79837365984517b2f6ee1"
  dependencies:
    is-stream "^1.0.1"
    pinkie-promise "^2.0.0"

hawk@~3.1.3:
  version "3.1.3"
  resolved "https://registry.yarnpkg.com/hawk/-/hawk-3.1.3.tgz#078444bd7c1640b0fe540d2c9b73d59678e8e1c4"
  dependencies:
    boom "2.x.x"
    cryptiles "2.x.x"
    hoek "2.x.x"
    sntp "1.x.x"

hawk@~6.0.2:
  version "6.0.2"
  resolved "https://registry.yarnpkg.com/hawk/-/hawk-6.0.2.tgz#af4d914eb065f9b5ce4d9d11c1cb2126eecc3038"
  dependencies:
    boom "4.x.x"
    cryptiles "3.x.x"
    hoek "4.x.x"
    sntp "2.x.x"

hoek@2.x.x:
  version "2.16.3"
  resolved "https://registry.yarnpkg.com/hoek/-/hoek-2.16.3.tgz#20bb7403d3cea398e91dc4710a8ff1b8274a25ed"

hoek@4.x.x:
  version "4.2.0"
  resolved "https://registry.yarnpkg.com/hoek/-/hoek-4.2.0.tgz#72d9d0754f7fe25ca2d01ad8f8f9a9449a89526d"

http-signature@~1.1.0:
  version "1.1.1"
  resolved "https://registry.yarnpkg.com/http-signature/-/http-signature-1.1.1.tgz#df72e267066cd0ac67fb76adf8e134a8fbcf91bf"
  dependencies:
    assert-plus "^0.2.0"
    jsprim "^1.2.2"
    sshpk "^1.7.0"

http-signature@~1.2.0:
  version "1.2.0"
  resolved "https://registry.yarnpkg.com/http-signature/-/http-signature-1.2.0.tgz#9aecd925114772f3d95b65a60abb8f7c18fbace1"
  dependencies:
    assert-plus "^1.0.0"
    jsprim "^1.2.2"
    sshpk "^1.7.0"

image-size@~0.3.5:
  version "0.3.5"
  resolved "https://registry.yarnpkg.com/image-size/-/image-size-0.3.5.tgz#83240eab2fb5b00b04aab8c74b0471e9cba7ad8c"

inherits@^2.0.3, inherits@~2.0.3:
  version "2.0.3"
  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"

is-stream@^1.0.1:
  version "1.1.0"
  resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-1.1.0.tgz#12d4a3dd4e68e0b79ceb8dbc84173ae80d91ca44"

is-typedarray@~1.0.0:
  version "1.0.0"
  resolved "https://registry.yarnpkg.com/is-typedarray/-/is-typedarray-1.0.0.tgz#e479c80858df0c1b11ddda6940f96011fcda4a9a"

isarray@~1.0.0:
  version "1.0.0"
  resolved "https://registry.yarnpkg.com/isarray/-/isarray-1.0.0.tgz#bb935d48582cba168c06834957a54a3e07124f11"

isexe@^2.0.0:
  version "2.0.0"
  resolved "https://registry.yarnpkg.com/isexe/-/isexe-2.0.0.tgz#e8fbf374dc556ff8947a10dcb0572d633f2cfa10"

isstream@~0.1.2:
  version "0.1.2"
  resolved "https://registry.yarnpkg.com/isstream/-/isstream-0.1.2.tgz#47e63f7af55afa6f92e1500e690eb8b8529c099a"

jsbn@~0.1.0:
  version "0.1.1"
  resolved "https://registry.yarnpkg.com/jsbn/-/jsbn-0.1.1.tgz#a5e654c2e5a2deb5f201d96cefbca80c0ef2f513"

json-schema-traverse@^0.3.0:
  version "0.3.1"
  resolved "https://registry.yarnpkg.com/json-schema-traverse/-/json-schema-traverse-0.3.1.tgz#349a6d44c53a51de89b40805c5d5e59b417d3340"

json-schema@0.2.3:
  version "0.2.3"
  resolved "https://registry.yarnpkg.com/json-schema/-/json-schema-0.2.3.tgz#b480c892e59a2f05954ce727bd3f2a4e882f9e13"

json-stable-stringify@^1.0.1:
  version "1.0.1"
  resolved "https://registry.yarnpkg.com/json-stable-stringify/-/json-stable-stringify-1.0.1.tgz#9a759d39c5f2ff503fd5300646ed445f88c4f9af"
  dependencies:
    jsonify "~0.0.0"

json-stringify-safe@~5.0.1:
  version "5.0.1"
  resolved "https://registry.yarnpkg.com/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz#1296a2d58fd45f19a0f6ce01d65701e2c735b6eb"

jsonfile@^2.1.0:
  version "2.4.0"
  resolved "https://registry.yarnpkg.com/jsonfile/-/jsonfile-2.4.0.tgz#3736a2b428b87bbda0cc83b53fa3d633a35c2ae8"
  optionalDependencies:
    graceful-fs "^4.1.6"

jsonify@~0.0.0:
  version "0.0.0"
  resolved "https://registry.yarnpkg.com/jsonify/-/jsonify-0.0.0.tgz#2c74b6ee41d93ca51b7b5aaee8f503631d252a73"

jsprim@^1.2.2:
  version "1.4.1"
  resolved "https://registry.yarnpkg.com/jsprim/-/jsprim-1.4.1.tgz#313e66bc1e5cc06e438bc1b7499c2e5c56acb6a2"
  dependencies:
    assert-plus "1.0.0"
    extsprintf "1.3.0"
    json-schema "0.2.3"
    verror "1.10.0"

kew@~0.7.0:
  version "0.7.0"
  resolved "https://registry.yarnpkg.com/kew/-/kew-0.7.0.tgz#79d93d2d33363d6fdd2970b335d9141ad591d79b"

klaw@^1.0.0:
  version "1.3.1"
  resolved "https://registry.yarnpkg.com/klaw/-/klaw-1.3.1.tgz#4088433b46b3b1ba259d78785d8e96f73ba02439"
  optionalDependencies:
    graceful-fs "^4.1.9"

less@2.5.3:
  version "2.5.3"
  resolved "https://registry.yarnpkg.com/less/-/less-2.5.3.tgz#9ff586e8a703515fc18dc99c7bc498d2f3ad4849"
  optionalDependencies:
    errno "^0.1.1"
    graceful-fs "^3.0.5"
    image-size "~0.3.5"
    mime "^1.2.11"
    mkdirp "^0.5.0"
    promise "^6.0.1"
    request "^2.51.0"
    source-map "^0.4.2"

mime-db@~1.30.0:
  version "1.30.0"
  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.30.0.tgz#74c643da2dd9d6a45399963465b26d5ca7d71f01"

mime-types@^2.1.12, mime-types@~2.1.17, mime-types@~2.1.7:
  version "2.1.17"
  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.17.tgz#09d7a393f03e995a79f8af857b70a9e0ab16557a"
  dependencies:
    mime-db "~1.30.0"

mime@^1.2.11:
  version "1.4.1"
  resolved "https://registry.yarnpkg.com/mime/-/mime-1.4.1.tgz#121f9ebc49e3766f311a76e1fa1c8003c4b03aa6"

minimist@0.0.8:
  version "0.0.8"
  resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"

mkdirp@0.5.0:
  version "0.5.0"
  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.0.tgz#1d73076a6df986cd9344e15e71fcc05a4c9abf12"
  dependencies:
    minimist "0.0.8"

mkdirp@^0.5.0:
  version "0.5.1"
  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
  dependencies:
    minimist "0.0.8"

ms@0.7.1:
  version "0.7.1"
  resolved "https://registry.yarnpkg.com/ms/-/ms-0.7.1.tgz#9cd13c03adbff25b65effde7ce864ee952017098"

natives@^1.1.0:
  version "1.1.0"
  resolved "https://registry.yarnpkg.com/natives/-/natives-1.1.0.tgz#e9ff841418a6b2ec7a495e939984f78f163e6e31"

oauth-sign@~0.8.1, oauth-sign@~0.8.2:
  version "0.8.2"
  resolved "https://registry.yarnpkg.com/oauth-sign/-/oauth-sign-0.8.2.tgz#46a6ab7f0aead8deae9ec0565780b7d4efeb9d43"

pend@~1.2.0:
  version "1.2.0"
  resolved "https://registry.yarnpkg.com/pend/-/pend-1.2.0.tgz#7a57eb550a6783f9115331fcf4663d5c8e007a50"

performance-now@^0.2.0:
  version "0.2.0"
  resolved "https://registry.yarnpkg.com/performance-now/-/performance-now-0.2.0.tgz#33ef30c5c77d4ea21c5a53869d91b56d8f2555e5"

performance-now@^2.1.0:
  version "2.1.0"
  resolved "https://registry.yarnpkg.com/performance-now/-/performance-now-2.1.0.tgz#6309f4e0e5fa913ec1c69307ae364b4b377c9e7b"

phantomjs-prebuilt@^2.1.15:
  version "2.1.15"
  resolved "https://registry.yarnpkg.com/phantomjs-prebuilt/-/phantomjs-prebuilt-2.1.15.tgz#20f86e82d3349c505917527745b7a411e08b3903"
  dependencies:
    es6-promise "~4.0.3"
    extract-zip "~1.6.5"
    fs-extra "~1.0.0"
    hasha "~2.2.0"
    kew "~0.7.0"
    progress "~1.1.8"
    request "~2.81.0"
    request-progress "~2.0.1"
    which "~1.2.10"

pinkie-promise@^2.0.0:
  version "2.0.1"
  resolved "https://registry.yarnpkg.com/pinkie-promise/-/pinkie-promise-2.0.1.tgz#2135d6dfa7a358c069ac9b178776288228450ffa"
  dependencies:
    pinkie "^2.0.0"

pinkie@^2.0.0:
  version "2.0.4"
  resolved "https://registry.yarnpkg.com/pinkie/-/pinkie-2.0.4.tgz#72556b80cfa0d48a974e80e77248e80ed4f7f870"

process-nextick-args@~1.0.6:
  version "1.0.7"
  resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-1.0.7.tgz#150e20b756590ad3f91093f25a4f2ad8bff30ba3"

progress@~1.1.8:
  version "1.1.8"
  resolved "https://registry.yarnpkg.com/progress/-/progress-1.1.8.tgz#e260c78f6161cdd9b0e56cc3e0a85de17c7a57be"

promise@^6.0.1:
  version "6.1.0"
  resolved "https://registry.yarnpkg.com/promise/-/promise-6.1.0.tgz#2ce729f6b94b45c26891ad0602c5c90e04c6eef6"
  dependencies:
    asap "~1.0.0"

prr@~0.0.0:
  version "0.0.0"
  resolved "https://registry.yarnpkg.com/prr/-/prr-0.0.0.tgz#1a84b85908325501411853d0081ee3fa86e2926a"

punycode@^1.4.1:
  version "1.4.1"
  resolved "https://registry.yarnpkg.com/punycode/-/punycode-1.4.1.tgz#c0d5a63b2718800ad8e1eb0fa5269c84dd41845e"

qs@~6.4.0:
  version "6.4.0"
  resolved "https://registry.yarnpkg.com/qs/-/qs-6.4.0.tgz#13e26d28ad6b0ffaa91312cd3bf708ed351e7233"

qs@~6.5.1:
  version "6.5.1"
  resolved "https://registry.yarnpkg.com/qs/-/qs-6.5.1.tgz#349cdf6eef89ec45c12d7d5eb3fc0c870343a6d8"

readable-stream@^2.2.2:
  version "2.3.3"
  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.3.tgz#368f2512d79f9d46fdfc71349ae7878bbc1eb95c"
  dependencies:
    core-util-is "~1.0.0"
    inherits "~2.0.3"
    isarray "~1.0.0"
    process-nextick-args "~1.0.6"
    safe-buffer "~5.1.1"
    string_decoder "~1.0.3"
    util-deprecate "~1.0.1"

request-progress@~2.0.1:
  version "2.0.1"
  resolved "https://registry.yarnpkg.com/request-progress/-/request-progress-2.0.1.tgz#5d36bb57961c673aa5b788dbc8141fdf23b44e08"
  dependencies:
    throttleit "^1.0.0"

request@^2.51.0:
  version "2.83.0"
  resolved "https://registry.yarnpkg.com/request/-/request-2.83.0.tgz#ca0b65da02ed62935887808e6f510381034e3356"
  dependencies:
    aws-sign2 "~0.7.0"
    aws4 "^1.6.0"
    caseless "~0.12.0"
    combined-stream "~1.0.5"
    extend "~3.0.1"
    forever-agent "~0.6.1"
    form-data "~2.3.1"
    har-validator "~5.0.3"
    hawk "~6.0.2"
    http-signature "~1.2.0"
    is-typedarray "~1.0.0"
    isstream "~0.1.2"
    json-stringify-safe "~5.0.1"
    mime-types "~2.1.17"
    oauth-sign "~0.8.2"
    performance-now "^2.1.0"
    qs "~6.5.1"
    safe-buffer "^5.1.1"
    stringstream "~0.0.5"
    tough-cookie "~2.3.3"
    tunnel-agent "^0.6.0"
    uuid "^3.1.0"

request@~2.81.0:
  version "2.81.0"
  resolved "https://registry.yarnpkg.com/request/-/request-2.81.0.tgz#c6928946a0e06c5f8d6f8a9333469ffda46298a0"
  dependencies:
    aws-sign2 "~0.6.0"
    aws4 "^1.2.1"
    caseless "~0.12.0"
    combined-stream "~1.0.5"
    extend "~3.0.0"
    forever-agent "~0.6.1"
    form-data "~2.1.1"
    har-validator "~4.2.1"
    hawk "~3.1.3"
    http-signature "~1.1.0"
    is-typedarray "~1.0.0"
    isstream "~0.1.2"
    json-stringify-safe "~5.0.1"
    mime-types "~2.1.7"
    oauth-sign "~0.8.1"
    performance-now "^0.2.0"
    qs "~6.4.0"
    safe-buffer "^5.0.1"
    stringstream "~0.0.4"
    tough-cookie "~2.3.0"
    tunnel-agent "^0.6.0"
    uuid "^3.0.0"

safe-buffer@^5.0.1, safe-buffer@^5.1.1, safe-buffer@~5.1.0, safe-buffer@~5.1.1:
  version "5.1.1"
  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.1.tgz#893312af69b2123def71f57889001671eeb2c853"

sntp@1.x.x:
  version "1.0.9"
  resolved "https://registry.yarnpkg.com/sntp/-/sntp-1.0.9.tgz#6541184cc90aeea6c6e7b35e2659082443c66198"
  dependencies:
    hoek "2.x.x"

sntp@2.x.x:
  version "2.0.2"
  resolved "https://registry.yarnpkg.com/sntp/-/sntp-2.0.2.tgz#5064110f0af85f7cfdb7d6b67a40028ce52b4b2b"
  dependencies:
    hoek "4.x.x"

source-map@^0.4.2:
  version "0.4.4"
  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.4.4.tgz#eba4f5da9c0dc999de68032d8b4f76173652036b"
  dependencies:
    amdefine ">=0.0.4"

sshpk@^1.7.0:
  version "1.13.1"
  resolved "https://registry.yarnpkg.com/sshpk/-/sshpk-1.13.1.tgz#512df6da6287144316dc4c18fe1cf1d940739be3"
  dependencies:
    asn1 "~0.2.3"
    assert-plus "^1.0.0"
    dashdash "^1.12.0"
    getpass "^0.1.1"
  optionalDependencies:
    bcrypt-pbkdf "^1.0.0"
    ecc-jsbn "~0.1.1"
    jsbn "~0.1.0"
    tweetnacl "~0.14.0"

string_decoder@~1.0.3:
  version "1.0.3"
  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.0.3.tgz#0fc67d7c141825de94282dd536bec6b9bce860ab"
  dependencies:
    safe-buffer "~5.1.0"

stringstream@~0.0.4, stringstream@~0.0.5:
  version "0.0.5"
  resolved "https://registry.yarnpkg.com/stringstream/-/stringstream-0.0.5.tgz#4e484cd4de5a0bbbee18e46307710a8a81621878"

throttleit@^1.0.0:
  version "1.0.0"
  resolved "https://registry.yarnpkg.com/throttleit/-/throttleit-1.0.0.tgz#9e785836daf46743145a5984b6268d828528ac6c"

tough-cookie@~2.3.0, tough-cookie@~2.3.3:
  version "2.3.3"
  resolved "https://registry.yarnpkg.com/tough-cookie/-/tough-cookie-2.3.3.tgz#0b618a5565b6dea90bf3425d04d55edc475a7561"
  dependencies:
    punycode "^1.4.1"

tunnel-agent@^0.6.0:
  version "0.6.0"
  resolved "https://registry.yarnpkg.com/tunnel-agent/-/tunnel-agent-0.6.0.tgz#27a5dea06b36b04a0a9966774b290868f0fc40fd"
  dependencies:
    safe-buffer "^5.0.1"

tweetnacl@^0.14.3, tweetnacl@~0.14.0:
  version "0.14.5"
  resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-0.14.5.tgz#5ae68177f192d4456269d108afa93ff8743f4f64"

typedarray@^0.0.6:
  version "0.0.6"
  resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"

util-deprecate@~1.0.1:
  version "1.0.2"
  resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"

uuid@^3.0.0, uuid@^3.1.0:
  version "3.1.0"
  resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.1.0.tgz#3dd3d3e790abc24d7b0d3a034ffababe28ebbc04"

verror@1.10.0:
  version "1.10.0"
  resolved "https://registry.yarnpkg.com/verror/-/verror-1.10.0.tgz#3a105ca17053af55d6e270c1f8288682e18da400"
  dependencies:
    assert-plus "^1.0.0"
    core-util-is "1.0.2"
    extsprintf "^1.2.0"

which@~1.2.10:
  version "1.2.14"
  resolved "https://registry.yarnpkg.com/which/-/which-1.2.14.tgz#9a87c4378f03e827cecaf1acdf56c736c01c14e5"
  dependencies:
    isexe "^2.0.0"

yauzl@2.4.1:
  version "2.4.1"
  resolved "https://registry.yarnpkg.com/yauzl/-/yauzl-2.4.1.tgz#9528f442dab1b2284e58b4379bb194e22e0c4005"
  dependencies:
    fd-slicer "~1.0.1"