Add all /gnu/store/ prefixes found in PYTHONPATH to the prefixes where
site-packages (and .pth files) are searched.

*** Python-2.7.11/Lib/site.py.orig	2016-10-17 23:27:23.746149690 +0200
--- Python-2.7.11/Lib/site.py	2016-10-17 23:44:51.930871644 +0200
***************
*** 65,70 ****
--- 65,82 ----
  
  # Prefixes for site-packages; add additional prefixes like /usr/local here
  PREFIXES = [sys.prefix, sys.exec_prefix]
+ # Guix: Add all /gnu/store-paths in PYTHONPATH--these are all
+ # "prefixes".  This is required to search .pth files in all python
+ # packages contained in /gnu/store which is required to make
+ # .pth-defined namespace packages work.
+ # This is necessary if the packages are not merged into a single
+ # `site-packages` directory (like when using `guix environment`) but
+ # listed in PYTHONPATH (like when running `guix build`).
+ for p in sys.path:
+     if p.startswith('/gnu/store/'):
+         PREFIXES.append(p[:p.find('/', 44)]) # find first pathsep after hash
+ del p
+ 
  # Enable per user site-packages directory
  # set it to False to disable the feature or True to force the feature
  ENABLE_USER_SITE = None
refs</a><a class='active' href='/guix/log/gnu/services/docker.scm'>log</a><a href='/guix/tree/gnu/services/docker.scm?id=e8f863704549445aeace0226bd0028e15d0eec5b'>tree</a><a href='/guix/commit/gnu/services/docker.scm?id=e8f863704549445aeace0226bd0028e15d0eec5b'>commit</a><a href='/guix/diff/gnu/services/docker.scm?id=e8f863704549445aeace0226bd0028e15d0eec5b'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/services/docker.scm'>
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<div class='path'>path: <a href='/guix/log/?id=e8f863704549445aeace0226bd0028e15d0eec5b'>root</a>/<a href='/guix/log/gnu?id=e8f863704549445aeace0226bd0028e15d0eec5b'>gnu</a>/<a href='/guix/log/gnu/services?id=e8f863704549445aeace0226bd0028e15d0eec5b'>services</a>/<a href='/guix/log/gnu/services/docker.scm?id=e8f863704549445aeace0226bd0028e15d0eec5b'>docker.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/services/docker.scm?id=e8f863704549445aeace0226bd0028e15d0eec5b&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-06-07 09:57:19 +0200'>2019-06-07</span></td><td><a href='/guix/commit/gnu/services/docker.scm?id=08814aec6ae75adcd059c5235c90ad26e5d5607e'>services: Add Singularity.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/linux.scm (singularity)[source](snippet): Change file
name of setuid helpers in libexec/cli/*.exec.
[arguments]: Remove "--disable-suid".
* gnu/services/docker.scm (%singularity-activation): New variable.
(singularity-setuid-programs): New procedure.
(singularity-service-type): New variable.
* gnu/tests/singularity.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* doc/guix.texi (Miscellaneous Services): Document it.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-05-05 20:14:15 -0400'>2019-05-05</span></td><td><a href='/guix/commit/gnu/services/docker.scm?id=7a31d93a61e96e631d852a48ddf475704b6a9b04'>services: docker: Add new fields to support proxy.</a><span class='msg-avail'>...<span class='msg-tooltip'>The Docker proxy enables inter-container and outside-to-container loopback,
and is required by the Docker registry server.

* gnu/services/docker.scm (docker-configuration)[proxy,
enable-proxy?]: Add fields.
(docker-shepherd-service): Use them.
(serialize-boolean): New function.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2019-02-11 18:29:01 +0100'>2019-02-11</span></td><td><a href='/guix/commit/gnu/services/docker.scm?id=1c84e68bde61cd5349c38e32d2de0955e141fbce'>services: docker: Make shepherd service also require "dbus-system",</a><span class='msg-avail'>...<span class='msg-tooltip'>"elogind" and "udev".

Fixes &lt;https://bugs.gnu.org/34333&gt;.

* gnu/services/docker.scm (docker-shepherd-service): Require "dbus-system",
"elogind" and "udev".
</span></span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2019-02-11 11:45:12 +0100'>2019-02-11</span></td><td><a href='/guix/commit/gnu/services/docker.scm?id=268e12a89492568f1a8f36bde786ad7f83104bc7'>services: docker: Make shepherd service require "networking".</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://bugs.gnu.org/34333&gt;.

* gnu/services/docker.scm (docker-shepherd-service): Require "networking".
</span></span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2019-01-11 02:53:28 +0100'>2019-01-11</span></td><td><a href='/guix/commit/gnu/services/docker.scm?id=9757b57f4efd13b2fcf5277145231288770d46d0'>services: docker: Update comment.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/docker.scm (docker-shepherd-service): Update comment.
</span></span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2019-01-10 19:17:49 +0100'>2019-01-10</span></td><td><a href='/guix/commit/gnu/services/docker.scm?id=8b0c1744154f0e9a008c4e4586bfdb0876749139'>services: docker: Use more minimal service requrements.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/docker.scm (docker-service-type)[requirement]: Add
file-system-/sys/fs/cgroup/blkio, file-system-/sys/fs/cgroup/cpu,
file-system-/sys/fs/cgroup/cpuset, file-system-/sys/fs/cgroup/devices,
file-system-/sys/fs/cgroup/memory.  Remove elogind.
</span></span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2019-01-10 19:17:48 +0100'>2019-01-10</span></td><td><a href='/guix/commit/gnu/services/docker.scm?id=d3a0e74d6a303cd46b0761b5a84c8e8b290e3797'>services: docker: Clarify service-extension shepherd-root-service-type.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/docker.scm (docker-service-type)[extensions]: Clarify
service-extension shepherd-root-service-type.
</span></span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2019-01-10 05:15:42 +0100'>2019-01-10</span></td><td><a href='/guix/commit/gnu/services/docker.scm?id=f946a370edbf65baab41e8373e25157da5029a88'>services: docker: Depend on elogind.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/docker.scm (docker-shepherd-service)[requirement]: Add elogind.
</span></span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2019-01-10 03:54:28 +0100'>2019-01-10</span></td><td><a href='/guix/commit/gnu/services/docker.scm?id=f0bfd0fc217a9af44b122f4e3cdf389a74594096'>services: docker: Specify log file for containerd.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/docker.scm (containerd-shepherd-service): Specify log file
for containerd.
</span></span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2019-01-10 03:00:55 +0100'>2019-01-10</span></td><td><a href='/guix/commit/gnu/services/docker.scm?id=8af4c335e32fbed7556a4cd7f26f93bc66afaace'>services: Add docker.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/docker.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* doc/guix.texi (Miscellaneous Services): Document the service.
</span></span></td><td>Danny Milosavljevic</td></tr>