nixpkgs/pkgs/development/libraries/kde-frameworks/kinit/kinit-libpath.patch

Index: kinit-5.32.0/src/kdeinit/kinit.cpp
===================================================================
--- kinit-5.32.0.orig/src/kdeinit/kinit.cpp
+++ kinit-5.32.0/src/kdeinit/kinit.cpp
@@ -623,19 +623,15 @@ static pid_t launch(int argc, const char
 
         if (!libpath.isEmpty()) {
             if (libpath_relative) {
-                // NB: Because Qt makes the actual dlopen() call, the
-                //     RUNPATH of kdeinit is *not* respected - see
-                //     https://sourceware.org/bugzilla/show_bug.cgi?id=13945
-                //     - so we try hacking it in ourselves
-                QString install_lib_dir = QFile::decodeName(
-                        CMAKE_INSTALL_PREFIX "/" LIB_INSTALL_DIR "/");
-                QString orig_libpath = libpath;
-                libpath = install_lib_dir + libpath;
-                l.setFileName(libpath);
-                if (!l.load()) {
-                    libpath = orig_libpath;
-                    l.setFileName(libpath);
-                    l.load();
+                // Try to load the library relative to the active profiles.
+                QByteArrayList profiles = qgetenv("NIX_PROFILES").split(' ');
+                // Reverse the profile list.
+                std::reverse(profiles.begin(), profiles.end());
+                for (const QByteArray &profile: profiles) {
+                    if (!profile.isEmpty()) {
+                        l.setFileName(QFile::decodeName(profile) + QStringLiteral("/lib/") + libpath);
+                        if (l.load()) break;
+                    }
                 }
             } else {
                 l.load();