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=0af4107d9f0f09d3023bbd2161dc7cf38441a40a'>root</a>/<a href='/guix/log/gnu?id=0af4107d9f0f09d3023bbd2161dc7cf38441a40a'>gnu</a>/<a href='/guix/log/gnu/system?id=0af4107d9f0f09d3023bbd2161dc7cf38441a40a'>system</a>/<a href='/guix/log/gnu/system/images?id=0af4107d9f0f09d3023bbd2161dc7cf38441a40a'>images</a>/<a href='/guix/log/gnu/system/images/novena.scm?id=0af4107d9f0f09d3023bbd2161dc7cf38441a40a'>novena.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/system/images/novena.scm?id=0af4107d9f0f09d3023bbd2161dc7cf38441a40a&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-09-07 14:24:53 +0200'>2022-09-07</span></td><td><a href='/guix/commit/gnu/system/images/novena.scm?id=e917f1242c169f011dedd133515de5e87e267b93'>system: images: Define the platform in image-types.</a><span class='msg-avail'>...<span class='msg-tooltip'>Running the following command where my-pine.scm contains an operating-system
declaration:

guix system image --image-type=pine64-raw my-pine.scm

returns:

guix system: error: package linux-libre-arm64-generic@5.18.19 does not support
x86_64-linux

That's because there's no platform defined in the pine64-raw image-type, hence
the guix system image tries to build the image for the host architecture.

* gnu/system/images/novena.scm (novena-image-type): Use the armv7-linux platform.
* gnu/system/images/pine64.scm (pine64-image-type): Use the aarch64-linux platform.
* gnu/system/images/pinebook-pro.scm (pinebook-pro-image-type): Use the aarch64-linux platform.
* gnu/system/images/rock64.scm (rock64-image-type): Use the aarch64-linux platform.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2022-05-25 09:27:25 +0200'>2022-05-25</span></td><td><a href='/guix/commit/gnu/system/images/novena.scm?id=dab819d5c4c55609efae098c8e3c2f2757c34e5b'>Move (gnu platform) and (gnu platforms ...) to guix/.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/platform.scm:
* gnu/platforms/arm.scm:
* gnu/platforms/hurd.scm:
* gnu/platforms/mips.scm:
* gnu/platforms/powerpc.scm:
* gnu/platforms/riscv.scm:
* gnu/platforms/s390.scm:
* gnu/platforms/x86.scm: Move to guix/.

* Makefile.am:
* doc/guix.texi (Porting to a New Platform):
* etc/release-manifest.scm:
* gnu/ci.scm:
* gnu/image.scm:
* gnu/local.mk:
* gnu/packages/bioinformatics.scm:
* gnu/packages/bootstrap.scm:
* gnu/packages/cross-base.scm:
* gnu/packages/instrumentation.scm:
* gnu/packages/linux.scm:
* gnu/system/image.scm:
* gnu/system/images/hurd.scm:
* gnu/system/images/novena.scm:
* gnu/system/images/pine64.scm:
* gnu/system/images/pinebook-pro.scm:
* gnu/system/images/rock64.scm:
* guix/scripts/build.scm:
* guix/scripts/system.scm:
* guix/self.scm: Update (gnu platform...) to (guix platform...).

Signed-off-by: Mathieu Othacehe &lt;othacehe@gnu.org&gt;
</span></span></td><td>Josselin Poiret</td></tr>