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=176440c056fdde6da98b11720989b1ed060ec97c'>root</a>/<a href='/guix/log/gnu?id=176440c056fdde6da98b11720989b1ed060ec97c'>gnu</a>/<a href='/guix/log/gnu/installer?id=176440c056fdde6da98b11720989b1ed060ec97c'>installer</a>/<a href='/guix/log/gnu/installer/dump.scm?id=176440c056fdde6da98b11720989b1ed060ec97c'>dump.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/gnu/installer/dump.scm?id=176440c056fdde6da98b11720989b1ed060ec97c&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-11-02 15:52:19 +0100'>2022-11-02</span></td><td><a href='/guix/commit/gnu/installer/dump.scm?id=80387bc7c3966602800116f5be3893c3d3044a96'>installer: Add core dump support.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes: &lt;https://issues.guix.gnu.org/58733&gt;

* gnu/installer.scm (installer-program): Enable core dump generation.
* gnu/installer/dump.scm (%core-dump): New variable.
(prepare-dump): Copy the core dump file.
* gnu/installer/newt/welcome.scm (run-welcome-page): Propose to report an
installation that previously generated a core dump.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2022-02-02 16:46:44 +0100'>2022-02-02</span></td><td><a href='/guix/commit/gnu/installer/dump.scm?id=ad55ccf9b18000144a4e0f28a0f9e57132f94edc'>installer: Make dump archive creation optional and selective.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/installer.scm (installer-program): Let the installer customize
the dump archive.
* gnu/installer/dump.scm (prepare-dump, make-dump): Split make-dump in
prepare-dump, which copies the files necessary for the dump, and
make-dump which creates the archive.
* gnu/installer/record.scm (installer): Add report-page field.  Change
documented return value of exit-error.
* gnu/installer/newt.scm (exit-error): Change arguments to be a string
containing the error.  Let the user choose between exiting and
initiating a dump.
(report-page): Add new variable.
* gnu/installer/newt/page.scm (run-dump-page): New variable.
* gnu/installer/newt/dump.scm: Delete it.

Signed-off-by: Mathieu Othacehe &lt;othacehe@gnu.org&gt;
</span></span></td><td>Josselin Poiret</td></tr>
<tr><td><span title='2022-02-02 16:46:42 +0100'>2022-02-02</span></td><td><a href='/guix/commit/gnu/installer/dump.scm?id=0d37a5df7e709cadca97cfbbf9c680dfe54b8302'>installer: Add crash dump upload support.</a><span class='msg-avail'>...<span class='msg-tooltip'>Suggested-by: Josselin Poiret &lt;dev@jpoiret.xyz&gt;

* gnu/installer/dump.scm: New file.
* gnu/installer/newt/dump.scm: New file.
* gnu/local.mk (INSTALLER_MODULES): Add them.
* gnu/installer/record.scm (&lt;installer&gt;)[dump-page]: New field.
* gnu/installer/steps.scm (%current-result): New variable.
(run-installer-steps): Update it.
* gnu/installer.scm (installer-program): Add tar and gip to the installer
path. Add guile-webutils and gnutls to the Guile extensions. Generate and send
the crash dump report.
* gnu/installer/newt.scm (exit-error): Add a report argument. Display the
report id.
(dump-page): New procedure.
(newt-installer): Update it.
</span></span></td><td>Mathieu Othacehe</td></tr>