Inital Install of Plone 5.1.4 - Cannot Find plone.recipe.precompiler

I am installing on RHEL 7 Update 6.

I get the following error when running the UnifiedInstaller:

sudo /usr/src/Plone-5.1.4-UnifiedInstaller/install.sh
--build-python
--password=123456789123
--target=/opt/plone
--instance=zinstance
--daemon-user=plone_daemon
--owner=buildout_user
--group=plone_group
standalone

##============================================================================
...
File "build/bdist.linux-x86_64/egg/zodbpickle/pickletools_3.py", line 2049
print("%5d:" % pos, end=' ', file=out)
^
SyntaxError: invalid syntax

File "build/bdist.linux-x86_64/egg/zodbpickle/pickle_3.py", line 178
def init(self, file, protocol=None, *, fix_imports=True):
^
SyntaxError: invalid syntax

File "build/bdist.linux-x86_64/egg/zodbpickle/tests/pickletester_3.py", line 145
class use_metaclass(object, metaclass=metaclass):
^
SyntaxError: invalid syntax

File "/opt/plone/buildout-cache/eggs/tmpdpaXuU/zodbpickle-0.7.0-py2.7-linux-x86_64.egg/zodbpickle/pickle_3.py", line 178
def init(self, file, protocol=None, *, fix_imports=True):
^
SyntaxError: invalid syntax

File "/opt/plone/buildout-cache/eggs/tmpdpaXuU/zodbpickle-0.7.0-py2.7-linux-x86_64.egg/zodbpickle/pickletools_3.py", line 2049
print("%5d:" % pos, end=' ', file=out)
^
SyntaxError: invalid syntax

File "/opt/plone/buildout-cache/eggs/tmpdpaXuU/zodbpickle-0.7.0-py2.7-linux-x86_64.egg/zodbpickle/tests/pickletester_3.py", line 145
class use_metaclass(object, metaclass=metaclass):
^
SyntaxError: invalid syntax

Got zodbpickle 0.7.0.
Not found: /opt/plone/buildout-cache/downloads/dist/plone.recipe.precompiler/
Not found: /opt/plone/buildout-cache/downloads/dist/plone.recipe.precompiler/
Couldn't find index page for 'plone.recipe.precompiler' (maybe misspelled?)
Getting distribution for 'plone.recipe.precompiler'.
Not found: /opt/plone/buildout-cache/downloads/dist/plone.recipe.precompiler/
Not found: /opt/plone/buildout-cache/downloads/dist/plone.recipe.precompiler/
Couldn't find index page for 'plone.recipe.precompiler' (maybe misspelled?)
While:
Installing.
Getting section precompiler.
Initializing section precompiler.
Installing recipe plone.recipe.precompiler.
Getting distribution for 'plone.recipe.precompiler'.
Error: Couldn't find a distribution for 'plone.recipe.precompiler'.
##============================================================================

How and where can I get the plone.recipe.precompiler?

I looked in the buildout-cache.tar.bz2 but it is not there.

The precompiler recipe package was omitted from the buildout cache. That's been fixed, and a new installer has been uploaded to launchpad.net and linked to the plone.org 5.1.4 release page.

Note: If you follow the Plone installation instructions here, you are told to execute:

wget --no-check-certificate https://launchpad.net/plone/5.1/5.1.4/+download/Plone-5.1.4-UnifiedInstaller.tgz

which has the problem with the missing egg.

To get your fix, one needs to use the following site instead...

https://launchpad.net/plone/5.1/5.1.4/+download/Plone-5.1.4-UnifiedInstaller-r1.tgz

(not obvious for someone following the instructions...)