Add placeholder for kinit's store file name.

diff --git a/src/kdeinitinterface.cpp b/src/kdeinitinterface.cpp
index 22fa5e5..3d40937 100644
--- a/src/kdeinitinterface.cpp
+++ b/src/kdeinitinterface.cpp
@@ -52,7 +52,7 @@ void KDEInitInterface::ensureKdeinitRunning()
     // If not found in system paths, search other paths
     if (srv.isEmpty()) {
         const QStringList searchPaths = QStringList()
-            << QCoreApplication::applicationDirPath() // then look where our application binary is located
+            << QString::fromUtf8("@SUBSTITUTEME@/bin") // using QStringLiteral would be more efficient, but breaks guix store reference detection.
             << QLibraryInfo::location(QLibraryInfo::BinariesPath); // look where exec path is (can be set in qt.conf)
         srv = QStandardPaths::findExecutable(QStringLiteral("kdeinit5"), searchPaths);
         if (srv.isEmpty()) {
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<tr><td><span title='2019-03-25 23:37:06 +0100'>2019-03-25</span></td><td><a href='/guix/commit/gnu/tests.scm?id=cf848cc0a17a3a58d600116896f6e7abfb0440d4'>accounts: Add default value for the 'home-directory' field of &lt;user-account&gt;.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-08-29 23:32:01 +0200'>2018-08-29</span></td><td><a href='/guix/commit/gnu/tests.scm?id=d258c791441b46705f4360cf141343363d1751f2'>tests: Warn about test module load failures.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-05-28 13:24:19 +0200'>2018-05-28</span></td><td><a href='/guix/commit/gnu/tests.scm?id=9ceeca0880248eee8c2796f5e6ebc172b95277f7'>system: Remove uses of the 'title' field of &lt;file-system&gt;.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-02-19 22:04:11 +0100'>2018-02-19</span></td><td><a href='/guix/commit/gnu/tests.scm?id=27a2c9c3e071fdb380c2f4f389b7cf4008dc75f7'>marionette: Use QEMU's "VM channel" mechanism.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-01-09 20:02:26 +0100'>2018-01-09</span></td><td><a href='/guix/commit/gnu/tests.scm?id=16d78a8f7207271e662d9152150b0cf790492373'>tests: marionette-operating-system: Add initrd parameter and kernel-arguments.</a><span class='msg-avail'>...</span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2017-12-06 15:02:24 +0100'>2017-12-06</span></td><td><a href='/guix/commit/gnu/tests.scm?id=fdfdecdb7ebfd05b4ae66cc5140078dbfc10fc35'>gnu, doc, tests: Use ‘bootloader-configuration’ everywhere.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-08-23 22:23:19 +0200'>2017-08-23</span></td><td><a href='/guix/commit/gnu/tests.scm?id=045ebb3e58d74c75f39ce47380045d3cd00359c3'>gnu: bootloader: Deprecate "device" field in favor of "target".</a><span class='msg-avail'>...</span></td><td>Andy Wingo</td></tr>