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;
 }
 
ix/'>summary</a><a href='/guix/refs/?id=f76793efd97fc7b3fad57c08760d9e4f90bf4865'>refs</a><a class='active' href='/guix/log/m4'>log</a><a href='/guix/tree/m4?id=f76793efd97fc7b3fad57c08760d9e4f90bf4865'>tree</a><a href='/guix/commit/m4?id=f76793efd97fc7b3fad57c08760d9e4f90bf4865'>commit</a><a href='/guix/diff/m4?id=f76793efd97fc7b3fad57c08760d9e4f90bf4865'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/m4'>
<input type='hidden' name='id' value='f76793efd97fc7b3fad57c08760d9e4f90bf4865'/><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=f76793efd97fc7b3fad57c08760d9e4f90bf4865'>root</a>/<a href='/guix/log/m4?id=f76793efd97fc7b3fad57c08760d9e4f90bf4865'>m4</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/m4?id=f76793efd97fc7b3fad57c08760d9e4f90bf4865&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-11-07 18:07:11 +0200'>2023-11-07</span></td><td><a href='/guix/commit/m4?id=220759226e93d76d8d80058f69f9d8b29714bbde'>build: Fix spelling in m4 macros.</a><span class='msg-avail'>...<span class='msg-tooltip'>* m4/guix.m4 (GUIX_CHECK_GUILE_SSH): Fix spelling of parameter.
(GUIX_CHECK_FILE_NAME_LIMITS): Fix spelling of maximum.

Change-Id: I93c80441393622a4bc06daa475eee13874cca527
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2023-03-16 12:37:03 +0100'>2023-03-16</span></td><td><a href='/guix/commit/m4?id=8e3dfb3d6dfc0f19bd9a9f9b163f0f3d7dccc865'>build: Correct guix_system on musl libc distros.</a><span class='msg-avail'>...<span class='msg-tooltip'>* m4/guix.m4 (GUIX_SYSTEM_TYPE): Add linux-musl* case. This prevents
the macro from mis-parsing the host OS, which causes breakage when
building from source.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Antero Mejr</td></tr>