Update on Mavericks Destroys Keybase Command Line

I attempted to update keybase with "keybase update" after being unsuccessul with "keybase track max" (w/keybase suggesting the update).

Here's what I got:

C02M705CFD57:~ thomas.quinlan$ keybase update
info: Computed npm install prefix: /usr/local
info: Found keybase-installer: keybase-installer v0.1.22
info: Using default npm install prefix
info: Attempting software upgrade.....
info: Running `keybase-installer`
info: Made temporary directory: /var/folders/1q/xkxccbjd1713pn98pht7lw8w6zpbnj/T/keybase_install_jQFUQANgYY3ONIL9IG32Pg
info: Using keyset version v1
info: Fetching URL https://dist.keybase.io/sig/files/1/index.asc
info: Fetching URL https://dist.keybase.io/pkg/stable
info: Fetching URL https://dist.keybase.io/sig/files/1/keybase-0.4.14.tgz.asc
info: verified signature of keybase-0.4.14.tgz against keybase-0.4.14.tgz.asc
info: Running npm install keybase-0.4.14.tgz: this may take a minute, please be patient
npm ERR! error rolling back Error: EACCES, unlink '/usr/local/lib/node_modules/keybase'
npm ERR! error rolling back keybase@0.4.14 { [Error: EACCES, unlink '/usr/local/lib/node_modules/keybase']
npm ERR! error rolling back errno: 3,
npm ERR! error rolling back code: 'EACCES',
npm ERR! error rolling back path: '/usr/local/lib/node_modules/keybase' }
npm ERR! Error: EACCES, unlink '/usr/local/lib/node_modules/keybase'
npm ERR! { [Error: EACCES, unlink '/usr/local/lib/node_modules/keybase']
npm ERR! errno: 3,
npm ERR! code: 'EACCES',
npm ERR! path: '/usr/local/lib/node_modules/keybase' }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.

npm ERR! System Darwin 13.3.0
npm ERR! command "node" "/usr/local/bin/npm" "install" "-g" "/var/folders/1q/xkxccbjd1713pn98pht7lw8w6zpbnj/T/keybase_install_jQFUQANgYY3ONIL9IG32Pg/keybase-0.4.14.tgz"
npm ERR! cwd /Users/thomas.quinlan
npm ERR! node -v v0.10.29
npm ERR! npm -v 1.4.14
npm ERR! path /usr/local/lib/node_modules/keybase
npm ERR! code EACCES
npm ERR! errno 3
npm ERR! stack Error: EACCES, unlink '/usr/local/lib/node_modules/keybase'
npm ERR!
npm ERR! Additional logging details can be found in:
npm ERR! /Users/thomas.quinlan/npm-debug.log
npm ERR! not ok code 0
info: cleaning up tmpdir /var/folders/1q/xkxccbjd1713pn98pht7lw8w6zpbnj/T/keybase_install_jQFUQANgYY3ONIL9IG32Pg
error: exit code 3
error: exit code 254
C02M705CFD57:~ thomas.quinlan$

Now when I attempt to run keybase, I get:

C02M705CFD57:~ thomas.quinlan$ keybase
-bash: /usr/local/bin/keybase: No such file or directory

It looks like the rollback that NPM was supposed to do didn't work at all.

Start by reproducing the failed `keybase update` on the reported Mavericks setup and inspect the npm install and rollback behavior around `/usr/local/lib/node_modules/keybase`. Done means an update no longer removes the existing `/usr/local/bin/keybase` command when npm reports an EACCES failure.

Written by the indexing model from the issue text.