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;
 }
 
ght'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=de3c03a47160dec355d9b19ad5ca210d90c15fd7'>refs</a><a class='active' href='/guix/log/gnu/packages/gobby.scm?showmsg=1'>log</a><a href='/guix/tree/gnu/packages/gobby.scm?id=de3c03a47160dec355d9b19ad5ca210d90c15fd7'>tree</a><a href='/guix/commit/gnu/packages/gobby.scm?id=de3c03a47160dec355d9b19ad5ca210d90c15fd7'>commit</a><a href='/guix/diff/gnu/packages/gobby.scm?id=de3c03a47160dec355d9b19ad5ca210d90c15fd7'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/gobby.scm'>
<input type='hidden' name='id' value='de3c03a47160dec355d9b19ad5ca210d90c15fd7'/><input type='hidden' name='showmsg' value='1'/><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=de3c03a47160dec355d9b19ad5ca210d90c15fd7&amp;showmsg=1'>root</a>/<a href='/guix/log/gnu?id=de3c03a47160dec355d9b19ad5ca210d90c15fd7&amp;showmsg=1'>gnu</a>/<a href='/guix/log/gnu/packages?id=de3c03a47160dec355d9b19ad5ca210d90c15fd7&amp;showmsg=1'>packages</a>/<a href='/guix/log/gnu/packages/gobby.scm?id=de3c03a47160dec355d9b19ad5ca210d90c15fd7&amp;showmsg=1'>gobby.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/packages/gobby.scm?id=de3c03a47160dec355d9b19ad5ca210d90c15fd7'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2019-10-20 14:00:12 +0200'>2019-10-20</span></td><td class='logsubject'><a href='/guix/commit/gnu/packages/gobby.scm?id=0fe041bd9fa87d23b44969a3bcd99b1165a0f06e'>gnu: Remove more GCC &lt; 7 workarounds.</a></td><td>Marius Bakke</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* gnu/packages/abiword.scm (abiword)[arguments]: Do not pass "-std=c++11" to
the GCC command line.
* gnu/packages/aidc.scm (zbar)[arguments]: Likewise.
* gnu/packages/android.scm (android-libbase, android-libcutils,
android-libziparchive, fastboot)[arguments]: Likewise.
* gnu/packages/audio.scm (azr3, guitarix, suil)[arguments]: Likewise.
* gnu/packages/bioinformatics.scm (bless)[arguments]: Likewise.
* gnu/packages/bittorrent.scm (libtorrent-rasterbar)[arguments]: Likewise.
* gnu/packages/code.scm (rtags)[arguments]: Likewise.
* gnu/packages/coq.scm (coq-gappa)[arguments]: Likewise.
* gnu/packages/emulators.scm (dolphin-emu)[arguments]: Likewise.
* gnu/packages/engineering.scm (xyce-serial, xyce-parallel)[arguments]: Likewise.
* gnu/packages/gnupg.scm (pinentry-qt)[arguments]: Likewise.
* gnu/packages/gobby.scm (libnet6, obby)[arguments]: Likewise.
* gnu/packages/graph.scm (python-faiss)[arguments]: Likewise.
* gnu/packages/graphics.scm (povray)[arguments]: Likewise.
* gnu/packages/image-processing.scm (opencv, itk-snap)[arguments]: Likewise.
* gnu/packages/image.scm (freeimage)[arguments]: Likewise.
* gnu/packages/kodi.scm (crossguid)[arguments]: Likewise.
* gnu/packages/music.scm (amsynth, qmidiarp, qmidiroute, seq24)[arguments]: Likewise.
* gnu/packages/pdf.scm (python-poppler-qt5)[arguments]: Likewise.
* gnu/packages/sagemath.scm (lcalc)[arguments]: Likewise.
* gnu/packages/video.scm (vlc, mlt, v4l-utils)[arguments]: Likewise.


</td></tr>