Adopted from NixOS
pkgs/development/libraries/kde-frameworks/kio/samba-search-path.patch

===================================================================
--- kio-5.17.0.orig/src/core/ksambashare.cpp
+++ kio-5.17.0/src/core/ksambashare.cpp
@@ -67,13 +67,18 @@ KSambaSharePrivate::~KSambaSharePrivate(
 
 bool KSambaSharePrivate::isSambaInstalled()
 {
-    if (QFile::exists(QStringLiteral("/usr/sbin/smbd"))
-            || QFile::exists(QStringLiteral("/usr/local/sbin/smbd"))) {
-        return true;
+    const QByteArray pathEnv = qgetenv("PATH");
+    if (!pathEnv.isEmpty()) {
+        QLatin1Char pathSep(':');
+        QStringList paths = QFile::decodeName(pathEnv).split(pathSep, QString::SkipEmptyParts);
+        for (QStringList::iterator it = paths.begin(); it != paths.end(); ++it) {
+            it->append(QStringLiteral("/smbd"));
+            if (QFile::exists(*it)) {
+                return true;
+            }
+        }
     }
 
-    //qDebug() << "Samba is not installed!";
-
     return false;
 }
 
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<div class='path'>path: <a href='/guix/log/?id=59706daf02296a3814ffb3128d2ceb2a71de3950'>root</a>/<a href='/guix/log/.dir-locals.el?id=59706daf02296a3814ffb3128d2ceb2a71de3950'>.dir-locals.el</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/.dir-locals.el?id=59706daf02296a3814ffb3128d2ceb2a71de3950&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-10-20 00:33:26 +0200'>2023-10-20</span></td><td><a href='/guix/commit/.dir-locals.el?id=dd19f3c39de08c1bd48adf571424a7169c968f52'>.dir-locals.el: Adjust indentation rule for ‘test-assertm’.</a><span class='msg-avail'>...<span class='msg-tooltip'>This reverts commit 92755c6352fd967bc74d8e5354aad057d779b717, which, at
the time, was correct for the 3-argument ‘test-assertm’ macro in
‘tests/pack.scm’ but incorrect for the 2-argument variant found in
other test files.

* .dir-locals.el: Decrease argument count for ‘test-assertm’.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-09-17 16:42:03 -0400'>2023-09-17</span></td><td><a href='/guix/commit/.dir-locals.el?id=fc1b4756e36857e66986a30a6652ee988f8f30fd'>.dir-locals.el: Update bug-reference configuration and document it.</a><span class='msg-avail'>...<span class='msg-tooltip'>(nil) &lt;bug-reference-url-format&gt;: Update URL.  Add comment.
* doc/contributing.texi (The Perfect Setup): New "Viewing bugs within Emacs"
subsection.

Co-authored-by: Brian Cully &lt;bjc@spork.org&gt;
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2023-09-06 14:16:22 -0400'>2023-09-06</span></td><td><a href='/guix/commit/.dir-locals.el?id=65dcfb3f3865d08467da747041263fd22460d393'>.dir-locals: Streamline Geiser configuration.</a><span class='msg-avail'>...<span class='msg-tooltip'>Geiser now has support locating the project root and adding it to the load
path without external help; leverage it.

* .dir-locals.el [nil]: Remove obsolete Geiser configuration.  Set the
geiser-repl-per-project-p variable to t.
* doc/contributing.texi (The Perfect Setup): No longer mention explicitly
setting the geiser-guile-load-path; instead mention the effect of the
.dir-locals.el file.

Reported-by: Wolf &lt;wolf@wolfsden.cz&gt;
</span></span></td><td>Maxim Cournoyer</td></tr>