nixpkgs/pkgs/development/libraries/qt-5/5.12/qtbase.patch.d/0010-qtbase-qtpluginpath.patch

From a3aaebda6d4b302cd202c21e306c55d3715e9b0d Mon Sep 17 00:00:00 2001
From: Thomas Tuegel <ttuegel@mailbox.org>
Date: Tue, 17 Sep 2019 05:36:41 -0500
Subject: [PATCH 10/12] qtbase-qtpluginpath

---
 src/corelib/kernel/qcoreapplication.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/corelib/kernel/qcoreapplication.cpp b/src/corelib/kernel/qcoreapplication.cpp
index db6546028a..cc97c46004 100644
--- a/src/corelib/kernel/qcoreapplication.cpp
+++ b/src/corelib/kernel/qcoreapplication.cpp
@@ -2694,6 +2694,15 @@ QStringList QCoreApplication::libraryPaths()
         QStringList *app_libpaths = new QStringList;
         coreappdata()->app_libpaths.reset(app_libpaths);
 
+        // Add library paths derived from PATH
+        const QStringList paths = QFile::decodeName(qgetenv("PATH")).split(':');
+        const QString plugindir = QStringLiteral("../" NIXPKGS_QT_PLUGIN_PREFIX);
+        for (const QString &path: paths) {
+            if (!path.isEmpty()) {
+                app_libpaths->append(QDir::cleanPath(path + QDir::separator() + plugindir));
+            }
+        }
+
         QString libPathEnv = qEnvironmentVariable("QT_PLUGIN_PATH");
         if (!libPathEnv.isEmpty()) {
             QStringList paths = libPathEnv.split(QDir::listSeparator(), QString::SkipEmptyParts);
-- 
2.23.GIT