Have configure.py modify internal variables depending on the --qml-plugindir
configure option.
diff -u PyQt-gpl-5.4.alt/configure.py PyQt-gpl-5.4/configure.py
--- PyQt-gpl-5.4.alt/configure.py	2015-01-25 17:27:50.000000000 +0100
+++ PyQt-gpl-5.4/configure.py	2015-01-25 17:56:41.000000000 +0100
@@ -904,6 +904,9 @@
         if opts.pyuicinterpreter is not None:
             self.pyuic_interpreter = opts.pyuicinterpreter
 
+        if opts.qmlplugindir is not None:
+            self.qml_plugin_dir = opts.qmlplugindir
+
         if opts.qsciapidir is not None:
             self.qsci_api_dir = opts.qsciapidir
 
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<div class='path'>path: <a href='/guix/log/?id=5002e1ac05a029e6a5643733bc4f24ff29f3e268'>root</a>/<a href='/guix/log/tests?id=5002e1ac05a029e6a5643733bc4f24ff29f3e268'>tests</a>/<a href='/guix/log/tests/cran.scm?id=5002e1ac05a029e6a5643733bc4f24ff29f3e268'>cran.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/cran.scm?id=5002e1ac05a029e6a5643733bc4f24ff29f3e268&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-12-18 04:09:47 +0100'>2021-12-18</span></td><td><a href='/guix/commit/tests/cran.scm?id=10ceb3e84654e024f14a4b048e7d68492ed9dc7c'>import: cran: Fix description-&gt;package test.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-07-11 00:49:16 +0200'>2021-07-11</span></td><td><a href='/guix/commit/tests/cran.scm?id=aa6921634b4ea9988af0e37bfbb56780c431ef64'>import: cran: Emit new-style package inputs.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-01-16 23:14:05 +0100'>2020-01-16</span></td><td><a href='/guix/commit/tests/cran.scm?id=cfd1ed84013df85f0e473884ef4038b4bd7120d4'>import: cran: Avoid uses of '@@' in the tests.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-05-13 12:40:20 +0200'>2017-05-13</span></td><td><a href='/guix/commit/tests/cran.scm?id=db427602d8f993ee0025fa68d1af274aa8d69ab9'>import: cran: Robustify cran-package?.</a><span class='msg-avail'>...</span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2017-03-08 23:42:52 +0100'>2017-03-08</span></td><td><a href='/guix/commit/tests/cran.scm?id=dd420bf3430eb644b93ca224da4c0a3f5db7a42f'>tests: Avoid zero-expression 'begin' form.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>