diff --git a/src/plugins/mesonprojectmanager/CMakeLists.txt b/src/plugins/mesonprojectmanager/CMakeLists.txt
index d39aaebabee..c00334e188c 100644
--- a/src/plugins/mesonprojectmanager/CMakeLists.txt
+++ b/src/plugins/mesonprojectmanager/CMakeLists.txt
@@ -3,8 +3,6 @@ add_qtc_plugin(MesonProjectManager
   DEPENDS QmlJS
   PLUGIN_DEPENDS Core ProjectExplorer TextEditor QtSupport
   SOURCES
-  arrayoptionlineedit.cpp
-  arrayoptionlineedit.h
   buildoptions.h
   buildoptionsmodel.cpp
   buildoptionsmodel.h
diff --git a/src/plugins/mesonprojectmanager/arrayoptionlineedit.cpp b/src/plugins/mesonprojectmanager/arrayoptionlineedit.cpp
deleted file mode 100644
index 11aa45e31b5..00000000000
--- a/src/plugins/mesonprojectmanager/arrayoptionlineedit.cpp
+++ /dev/null
@@ -1,67 +0,0 @@
-// Copyright (C) 2020 Alexis Jeandet.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
-
-#include "arrayoptionlineedit.h"
-
-namespace MesonProjectManager::Internal {
-
-ArrayOptionLineEdit::ArrayOptionLineEdit(QWidget *parent)
-    : QPlainTextEdit(parent)
-{
-    m_highLighter = new RegexHighlighter(this);
-    m_highLighter->setDocument(this->document());
-    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
-    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
-    setLineWrapMode(QPlainTextEdit::NoWrap);
-    QFontMetrics metrics(this->font());
-    int lineHeight = metrics.lineSpacing();
-    this->setFixedHeight(lineHeight * 1.5);
-}
-
-QStringList ArrayOptionLineEdit::options()
-{
-    return m_highLighter->options(this->toPlainText());
-}
-
-void ArrayOptionLineEdit::keyPressEvent(QKeyEvent *e)
-{
-    if (e->key() != Qt::Key_Return)
-        return QPlainTextEdit::keyPressEvent(e);
-    e->accept();
-}
-
-RegexHighlighter::RegexHighlighter(QWidget *parent)
-    : QSyntaxHighlighter(parent)
-{
-    m_format.setUnderlineStyle(QTextCharFormat::SingleUnderline);
-    m_format.setUnderlineColor(QColor(180, 180, 180));
-    m_format.setBackground(QBrush(QColor(180, 180, 230, 80)));
-}
-
-QStringList RegexHighlighter::options(const QString &text)
-{
-    QRegularExpressionMatchIterator i = m_regex.globalMatch(text);
-    QStringList op;
-    while (i.hasNext()) {
-        QRegularExpressionMatch match = i.next();
-        for (int j = 1; j <= match.lastCapturedIndex(); j++) {
-            auto str = match.captured(j);
-            if (!str.isEmpty())
-                op.push_back(str);
-        }
-    }
-    return op;
-}
-
-void RegexHighlighter::highlightBlock(const QString &text)
-{
-    QRegularExpressionMatchIterator i = m_regex.globalMatch(text);
-    while (i.hasNext()) {
-        QRegularExpressionMatch match = i.next();
-        for (int j = 1; j <= match.lastCapturedIndex(); j++) {
-            setFormat(match.capturedStart(j), match.capturedLength(j), m_format);
-        }
-    }
-}
-
-} // namespace MesonProjectManager::Internal
diff --git a/src/plugins/mesonprojectmanager/arrayoptionlineedit.h b/src/plugins/mesonprojectmanager/arrayoptionlineedit.h
deleted file mode 100644
index c9b8cb6b2c1..00000000000
--- a/src/plugins/mesonprojectmanager/arrayoptionlineedit.h
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright (C) 2020 Alexis Jeandet.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
-
-#pragma once
-
-#include <QColor>
-#include <QPlainTextEdit>
-#include <QRegularExpression>
-#include <QSyntaxHighlighter>
-
-namespace MesonProjectManager::Internal {
-
-class RegexHighlighter : public QSyntaxHighlighter
-{
-    const QRegularExpression m_regex{R"('([^']+)'+|([^', ]+)[, ]*)"};
-    QTextCharFormat m_format;
-
-public:
-    RegexHighlighter(QWidget *parent);
-    void highlightBlock(const QString &text) override;
-    QStringList options(const QString &text);
-};
-
-class ArrayOptionLineEdit : public QPlainTextEdit
-{
-    Q_OBJECT
-    RegexHighlighter *m_highLighter;
-
-public:
-    ArrayOptionLineEdit(QWidget *parent = nullptr);
-    QStringList options();
-
-protected:
-    void keyPressEvent(QKeyEvent *e) override;
-};
-
-} // namespace MesonProjectManager::Internal
diff --git a/src/plugins/mesonprojectmanager/buildoptionsmodel.cpp b/src/plugins/mesonprojectmanager/buildoptionsmodel.cpp
index 5dff5f66b28..702176b517a 100644
--- a/src/plugins/mesonprojectmanager/buildoptionsmodel.cpp
+++ b/src/plugins/mesonprojectmanager/buildoptionsmodel.cpp
@@ -3,18 +3,91 @@
 
 #include "buildoptionsmodel.h"
 
-#include "arrayoptionlineedit.h"
 #include "mesonprojectmanagertr.h"
 
+#include <QColor>
 #include <QComboBox>
 #include <QLabel>
 #include <QLineEdit>
-#include <QMap>
-#include <QStyledItemDelegate>
-#include <QTextEdit>
+#include <QPlainTextEdit>
+#include <QRegularExpression>
+#include <QSyntaxHighlighter>
 
 namespace MesonProjectManager::Internal {
 
+static QRegularExpression &regExp()
+{
+    static QRegularExpression s_regexp{R"('([^']+)'+|([^', ]+)[, ]*)"};
+    return s_regexp;
+}
+
+class RegexHighlighter final : public QSyntaxHighlighter
+{
+public:
+    RegexHighlighter(QWidget *parent) : QSyntaxHighlighter(parent)
+    {
+        m_format.setUnderlineStyle(QTextCharFormat::SingleUnderline);
+        m_format.setUnderlineColor(QColor(180, 180, 180));
+        m_format.setBackground(QBrush(QColor(180, 180, 230, 80)));
+    }
+
+    void highlightBlock(const QString &text) final
+    {
+        QRegularExpressionMatchIterator i = regExp().globalMatch(text);
+        while (i.hasNext()) {
+            const QRegularExpressionMatch match = i.next();
+            for (int j = 1; j <= match.lastCapturedIndex(); j++)
+                setFormat(match.capturedStart(j), match.capturedLength(j), m_format);
+        }
+    }
+
+    QStringList options(const QString &text) const
+    {
+        QRegularExpressionMatchIterator i = regExp().globalMatch(text);
+        QStringList op;
+        while (i.hasNext()) {
+            const QRegularExpressionMatch match = i.next();
+            for (int j = 1; j <= match.lastCapturedIndex(); j++) {
+                auto str = match.captured(j);
+                if (!str.isEmpty())
+                    op.push_back(str);
+            }
+        }
+        return op;
+    }
+
+private:
+    QTextCharFormat m_format;
+};
+
+class ArrayOptionLineEdit final : public QPlainTextEdit
+{
+    Q_OBJECT
+
+public:
+    ArrayOptionLineEdit(QWidget *parent = nullptr) : QPlainTextEdit(parent)
+    {
+        m_highLighter = new RegexHighlighter(this);
+        m_highLighter->setDocument(document());
+        setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+        setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+        setLineWrapMode(QPlainTextEdit::NoWrap);
+        setFixedHeight(QFontMetrics(font()).lineSpacing() * 1.5);
+    }
+    QStringList options() const { return m_highLighter->options(toPlainText()); }
+
+protected:
+    void keyPressEvent(QKeyEvent *e) final
+    {
+        if (e->key() != Qt::Key_Return)
+            return QPlainTextEdit::keyPressEvent(e);
+        e->accept();
+    }
+
+private:
+    RegexHighlighter *m_highLighter = nullptr;
+};
+
 // this could be relaxed once we have something able to link reliably meson build type
 // to QTC build type and update it, this must not break any features like tests/debug/profiling...
 static const QStringList lockedOptions = {"buildtype", "debug", "backend", "optimization"};
@@ -192,3 +265,5 @@ void BuildOptionDelegate::setModelData(QWidget *editor,
 }
 
 } // namespace MesonProjectManager::Internal
+
+#include "buildoptionsmodel.moc"
diff --git a/src/plugins/mesonprojectmanager/mesonprojectmanager.qbs b/src/plugins/mesonprojectmanager/mesonprojectmanager.qbs
index 7c93d86ec7f..ac82d811029 100644
--- a/src/plugins/mesonprojectmanager/mesonprojectmanager.qbs
+++ b/src/plugins/mesonprojectmanager/mesonprojectmanager.qbs
@@ -30,8 +30,6 @@ Project {
             "target.h",
             "mesonpluginconstants.h",
             "mesonprojectplugin.cpp",
-            "arrayoptionlineedit.cpp",
-            "arrayoptionlineedit.h",
             "buildoptionsmodel.cpp",
             "buildoptionsmodel.h",
             "mesonbuildconfiguration.cpp",