Etherpad 14.0 appliance fails to build (common nodejs-install seems to be broken)

Greetings!

This might just belong over in the bug tracker bug I figured I should start here.  I'm trying to build some of the 14.0 appliances and have been successful with a few (core, LAMP) but I'm running into problems with etherpad.  TL;DR the install script for node.js seems to be broken (yes, I did do the git pull in common).  My attempt to fix it is below but etherpad-lite eventually complains that it's not the right version of node.js

It does okay until it starts running the nodejs-install common script.  Then I get this:

fab-chroot build/root.patched --script /turnkey/fab/common/conf/nodejs-install
+ SRC=/usr/local/src
+ dl http://nodejs.org/dist/latest/SHASUMS.txt /usr/local/src
+ '[' http://127.0.0.1:8124 ']'
+ PROXY='--proxy http://127.0.0.1:8124'
+ cd /usr/local/src
+ curl -L -f -O --proxy http://127.0.0.1:8124 http://nodejs.org/dist/latest/SHASUMS.txt
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0curl: (22) The requested URL returned error: 404 Not Found
/usr/share/fab/product.mk:476: recipe for target 'build/stamps/root.patched' failed
make: *** [build/stamps/root.patched] Error 22

I've tried exploring things a little bit.  A quick examination of 'nodejs.org/dist/latest' shows that in fact SHASUMS.txt does not exist.  There is a file called SHASUMS256.txt so I tried messing with that, edited the nodejs-install script to get it to grab the sha256 file, little mangling of the regex to get the latest tarball (there's two now, .gz and .xz so I had to pick one), hoping that would be enough.

#!/bin/bash -ex

SRC=/usr/local/src

dl() {
    [ "$FAB_HTTP_PROXY" ] && PROXY="--proxy $FAB_HTTP_PROXY"
    cd $2; curl -L -f -O $PROXY $1; cd -
}

dl http://nodejs.org/dist/latest/SHASUMS256.txt $SRC

TARBALL_RE="linux-x${FAB_ARCH: -2:2}.*gz"
TARBALL=$(grep $TARBALL_RE $SRC/SHASUMS256.txt | cut -d " " -f 3)
dl http://nodejs.org/dist/latest/${TARBALL} $SRC

grep $TARBALL $SRC/SHASUMS256.txt > $SRC/$TARBALL.sha1
cd $SRC
sha256sum -c $TARBALL.sha1
rm SHASUMS256.txt $TARBALL.sha1

tar -zxf $SRC/$TARBALL -C $SRC
rm $SRC/$TARBALL
ln -s $SRC/node-v* $SRC/node

for f in $(ls $SRC/node/bin); do
    ln -s $SRC/node/bin/$f /usr/local/bin/$f
done

# npm completion
npm completion > /etc/skel/.bashrc.d/npm
chmod +x /etc/skel/.bashrc.d/npm
cp /etc/skel/.bashrc.d/npm /root/.bashrc.d/npm

This gets it past that problem but, not surprisingly, etherpad is still unhappy.  I eventually get this error when it tries to retrieve and install etherpad-lite and am not sure how to proceed:

+ [ http://127.0.0.1:8124 ]
+ export HTTP_PROXY=http://127.0.0.1:8124
+ dirname /opt/etherpad-lite
+ cd /opt
+ git clone https://github.com/ether/etherpad-lite.git
Cloning into 'etherpad-lite'...
remote: Counting objects: 26994, done.
remote: Total 26994 (delta 0), reused 0 (delta 0), pack-reused 26993
Receiving objects: 100% (26994/26994), 19.04 MiB | 3.76 MiB/s, done.
Resolving deltas: 100% (19087/19087), done.
Checking connectivity... done.
+ cd /opt/etherpad-lite
+ ./bin/installDeps.sh
You're running a wrong version of node, or io.js is not installed. You're using v4.1.0, we need v0.10.x, v0.11.x or v0.12.x
/usr/share/fab/product.mk:476: recipe for target 'build/stamps/root.patched' failed
make: *** [build/stamps/root.patched] Error 1

Basically, node.js is not installed right (or is not the right version).  Those version numbers are so drastically different I'm guessing something is fundamentally effed up here but I don't know anything about node.js or etherpad-lite's internals so I'm at a loss.  The spreadsheet indicates that the 14.0 etherpad appliance has made it through QA already (I think) so I was suprised to run into this.  I'm also guessing that node.js is a key part of other appliances so this probably needs some attention from someone that knows more than me!

Thanks!

Seth B.