Make PeachPy processes deterministic:

  https://github.com/Maratyszcza/PeachPy/issues/88
  https://issues.guix.gnu.org/50672

diff --git a/peachpy/name.py b/peachpy/name.py
index b6a03dc..412079d 100644
--- a/peachpy/name.py
+++ b/peachpy/name.py
@@ -86,13 +86,13 @@ def add_scoped_name(self, scoped_name):
                 self.names[scope_name.name] = scope
         else:
             assert scope_name.name is None
-            self.prenames.setdefault(scope_name.prename, set())
+            self.prenames.setdefault(scope_name.prename, {})
             if subscoped_name:
                 for subscope in iter(self.prenames[scope_name.prename]):
                     if isinstance(subscope, Namespace) and subscope.scope_name is scope_name:
                         subscope.add_scoped_name(subscoped_name)
                         return
-            self.prenames[scope_name.prename].add(scope)
+            self.prenames[scope_name.prename][scope] = None
 
     def assign_names(self):
         # Step 1: assign names to symbols with prenames with no conflicts
a><a href='/guix/refs/?id=778bde78cf184f4a713c67d0ae8af7899c4c95be'>refs</a><a class='active' href='/guix/log/tests/npm-binary.scm'>log</a><a href='/guix/tree/tests/npm-binary.scm?id=778bde78cf184f4a713c67d0ae8af7899c4c95be'>tree</a><a href='/guix/commit/tests/npm-binary.scm?id=778bde78cf184f4a713c67d0ae8af7899c4c95be'>commit</a><a href='/guix/diff/tests/npm-binary.scm?id=778bde78cf184f4a713c67d0ae8af7899c4c95be'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/tests/npm-binary.scm'>
<input type='hidden' name='id' value='778bde78cf184f4a713c67d0ae8af7899c4c95be'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=778bde78cf184f4a713c67d0ae8af7899c4c95be'>root</a>/<a href='/guix/log/tests?id=778bde78cf184f4a713c67d0ae8af7899c4c95be'>tests</a>/<a href='/guix/log/tests/npm-binary.scm?id=778bde78cf184f4a713c67d0ae8af7899c4c95be'>npm-binary.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/tests/npm-binary.scm?id=778bde78cf184f4a713c67d0ae8af7899c4c95be&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-05-19 16:05:00 +0200'>2024-05-19</span></td><td><a href='/guix/commit/tests/npm-binary.scm?id=0685042c4601e7e7a88aab9c1cbfbfb4092a5aa2'>import: Add binary npm importer.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/import.scm: (importers): Add "npm-binary".
* doc/guix.texi (Invoking guix import): Document npm-binary importer.
* guix/import/npm-binary.scm: New file.
* guix/scripts/import/npm-binary.scm: New file.
* tests/npm-binary.scm: New file.
* Makefile.am: Add them.

Co-authored-by: Timothy Sample &lt;samplet@ngyro.com&gt;
Co-authored-by: Lars-Dominik Braun &lt;lars@6xq.net&gt;

Change-Id: I98a45068cf5b9c42790664cc743feaa7ac76f807
</span></span></td><td>Jelle Licht</td></tr>