diff --git a/qmake/library/qmakeevaluator.cpp b/qmake/library/qmakeevaluator.cpp
index e3b20771d4a..14d940b4b7b 100644
--- a/qmake/library/qmakeevaluator.cpp
+++ b/qmake/library/qmakeevaluator.cpp
@@ -2050,6 +2050,10 @@ QMakeEvaluator::VisitReturn QMakeEvaluator::evaluateFeatureFile(
 
 #ifdef PROEVALUATOR_CUMULATIVE
     bool cumulative = m_cumulative;
+    // Even when evaluating the project in cumulative mode to maximize the
+    // chance of collecting all source declarations, prfs are evaluated in
+    // exact mode to maximize the chance of them successfully executing
+    // their programmatic function.
     m_cumulative = false;
 #endif
 
@@ -2058,6 +2062,13 @@ QMakeEvaluator::VisitReturn QMakeEvaluator::evaluateFeatureFile(
 
 #ifdef PROEVALUATOR_CUMULATIVE
     m_cumulative = cumulative;
+    if (cumulative) {
+        // As the data collected in cumulative mode is potentially total
+        // garbage, yet the prfs fed with it are executed in exact mode,
+        // we must ignore their results to avoid that evaluation is unduly
+        // aborted.
+        ok = ReturnTrue;
+    }
 #endif
     return ok;
 }
diff --git a/qmake/library/qmakeglobals.cpp b/qmake/library/qmakeglobals.cpp
index 471d9071e13..247084f6c61 100644
--- a/qmake/library/qmakeglobals.cpp
+++ b/qmake/library/qmakeglobals.cpp
@@ -311,7 +311,7 @@ QString QMakeGlobals::expandEnvVars(const QString &str) const
 bool QMakeGlobals::initProperties()
 {
     QByteArray data;
-#ifndef QT_BOOTSTRAPPED
+#if QT_CONFIG(process)
     QProcess proc;
     proc.start(qmake_abslocation, QStringList() << QLatin1String("-query"));
     if (!proc.waitForFinished())
diff --git a/qmake/library/qmakeglobals.h b/qmake/library/qmakeglobals.h
index 58b22ba8c59..55e70ac784a 100644
--- a/qmake/library/qmakeglobals.h
+++ b/qmake/library/qmakeglobals.h
@@ -38,7 +38,7 @@
 
 #include <qhash.h>
 #include <qstringlist.h>
-#ifndef QT_BOOTSTRAPPED
+#if QT_CONFIG(process)
 # include <qprocess.h>
 #endif
 #ifdef PROEVALUATOR_THREAD_SAFE