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
 
 type='hidden' name='id' value='c0fcbdfa9d20c80e60eb7a26fd0d107ee307393f'/><select name='h' onchange='this.form.submit();'>
<option value='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=c0fcbdfa9d20c80e60eb7a26fd0d107ee307393f'>refs</a><a class='active' href='/guix/log/etc/completion/bash'>log</a><a href='/guix/tree/etc/completion/bash?id=c0fcbdfa9d20c80e60eb7a26fd0d107ee307393f'>tree</a><a href='/guix/commit/etc/completion/bash?id=c0fcbdfa9d20c80e60eb7a26fd0d107ee307393f'>commit</a><a href='/guix/diff/etc/completion/bash?id=c0fcbdfa9d20c80e60eb7a26fd0d107ee307393f'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/etc/completion/bash'>
<input type='hidden' name='id' value='c0fcbdfa9d20c80e60eb7a26fd0d107ee307393f'/><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=c0fcbdfa9d20c80e60eb7a26fd0d107ee307393f'>root</a>/<a href='/guix/log/etc?id=c0fcbdfa9d20c80e60eb7a26fd0d107ee307393f'>etc</a>/<a href='/guix/log/etc/completion?id=c0fcbdfa9d20c80e60eb7a26fd0d107ee307393f'>completion</a>/<a href='/guix/log/etc/completion/bash?id=c0fcbdfa9d20c80e60eb7a26fd0d107ee307393f'>bash</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/etc/completion/bash?id=c0fcbdfa9d20c80e60eb7a26fd0d107ee307393f&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-11-06 00:04:11 +0100'>2018-11-06</span></td><td><a href='/guix/commit/etc/completion/bash?id=7082873ea2771ebef900333e0fa7468d6395f330'>bash completion: Restore completion of available packages for 'guix build'.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes a regression introduced in
9b0a755f642542dd96065ad05ec9d844d8077fd7 whereby 'guix build TAB' would
not suggest any completion.

* etc/completion/bash/guix (_guix_complete): Arrange so 'guix build TAB'
completes available packages.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-07-03 06:58:51 +0300'>2018-07-03</span></td><td><a href='/guix/commit/etc/completion/bash?id=3a15d0aa9c55881ddc3a21570350a743c28a6c92'>bash completion: Complete files names after 'guix weather -m'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/completion/bash/guix (_guix_complete): Complete files names after 'guix
weather -m'.
</span></span></td><td>Oleg Pykhalov</td></tr>
<tr><td><span title='2018-07-03 06:58:51 +0300'>2018-07-03</span></td><td><a href='/guix/commit/etc/completion/bash?id=9b0a755f642542dd96065ad05ec9d844d8077fd7'>bash completion: Complete files names after 'guix build -L'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/completion/bash/guix (_guix_complete): Complete files names after 'guix
build -L'.
</span></span></td><td>Oleg Pykhalov</td></tr>
<tr><td><span title='2018-06-16 21:23:11 +0300'>2018-06-16</span></td><td><a href='/guix/commit/etc/completion/bash?id=bba0fa2499eefab02cacfed9958dc498abfd484d'>Add guix-daemon Bash completion file.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/completion/bash/guix-daemon: New file.
* Makefile.am (dist_bashcompletion_DATA): Add this.
</span></span></td><td>Oleg Pykhalov</td></tr>