diff --git a/src/plugins/clangpchmanager/clangpchmanager.pro b/src/plugins/clangpchmanager/clangpchmanager.pro
index 3792f6d6a3f..a61103d8396 100644
--- a/src/plugins/clangpchmanager/clangpchmanager.pro
+++ b/src/plugins/clangpchmanager/clangpchmanager.pro
@@ -3,6 +3,8 @@ include(clangpchmanager-source.pri)
 include(../../shared/clang/clang_installation.pri)
 include(../../shared/clang/clang_defines.pri)
 
+requires(!isEmpty(LIBTOOLING_LIBS))
+
 HEADERS += \
     $$PWD/clangpchmanagerplugin.h \
     qtcreatorprojectupdater.h
diff --git a/src/plugins/clangrefactoring/clangrefactoring.pro b/src/plugins/clangrefactoring/clangrefactoring.pro
index 838e2da1b82..42efebd56a1 100644
--- a/src/plugins/clangrefactoring/clangrefactoring.pro
+++ b/src/plugins/clangrefactoring/clangrefactoring.pro
@@ -4,6 +4,8 @@ include(../../shared/clang/clang_installation.pri)
 
 include(../../shared/clang/clang_defines.pri)
 
+requires(!isEmpty(LIBTOOLING_LIBS))
+
 HEADERS += \
     $$PWD/clangrefactoringplugin.h \
     qtcreatorsearch.h \
diff --git a/src/plugins/plugins.pro b/src/plugins/plugins.pro
index fa872bb39f0..d1c774128bb 100644
--- a/src/plugins/plugins.pro
+++ b/src/plugins/plugins.pro
@@ -101,8 +101,8 @@ isEmpty(LLVM_INSTALL_DIR):LLVM_INSTALL_DIR=$$(LLVM_INSTALL_DIR)
 exists($$LLVM_INSTALL_DIR) {
     SUBDIRS += clangcodemodel
 
-    LIBTOOLING_LIBS=$$(LIBTOOLING_LIBS)
-    !isEmpty(LIBTOOLING_LIBS) {
+    QTC_NO_CLANG_LIBTOOLING=$$(QTC_NO_CLANG_LIBTOOLING)
+    isEmpty(QTC_NO_CLANG_LIBTOOLING) {
         SUBDIRS += clangrefactoring
         SUBDIRS += clangpchmanager
     } else {
diff --git a/src/tools/clangpchmanagerbackend/clangpchmanagerbackend.pro b/src/tools/clangpchmanagerbackend/clangpchmanagerbackend.pro
index 662979c0e22..b115782dfe7 100644
--- a/src/tools/clangpchmanagerbackend/clangpchmanagerbackend.pro
+++ b/src/tools/clangpchmanagerbackend/clangpchmanagerbackend.pro
@@ -5,6 +5,8 @@ include(../../qtcreatortool.pri)
 include(../../shared/clang/clang_installation.pri)
 include(source/clangpchmanagerbackend-source.pri)
 
+requires(!isEmpty(LIBTOOLING_LIBS))
+
 win32 {
     LLVM_BUILDMODE = $$system($$llvm_config --build-mode, lines)
     CONFIG(debug, debug|release):requires(equals(LLVM_BUILDMODE, "Debug"))
diff --git a/src/tools/clangrefactoringbackend/clangrefactoringbackend.pro b/src/tools/clangrefactoringbackend/clangrefactoringbackend.pro
index 518e203a4a4..705198f216e 100644
--- a/src/tools/clangrefactoringbackend/clangrefactoringbackend.pro
+++ b/src/tools/clangrefactoringbackend/clangrefactoringbackend.pro
@@ -5,6 +5,8 @@ include(../../qtcreatortool.pri)
 include(../../shared/clang/clang_installation.pri)
 include(source/clangrefactoringbackend-source.pri)
 
+requires(!isEmpty(LIBTOOLING_LIBS))
+
 win32 {
     LLVM_BUILDMODE = $$system($$llvm_config --build-mode, lines)
     CONFIG(debug, debug|release):requires(equals(LLVM_BUILDMODE, "Debug"))
diff --git a/src/tools/tools.pro b/src/tools/tools.pro
index 2e62f31b2c4..cfe34abaa0a 100644
--- a/src/tools/tools.pro
+++ b/src/tools/tools.pro
@@ -24,8 +24,8 @@ isEmpty(LLVM_INSTALL_DIR):LLVM_INSTALL_DIR=$$(LLVM_INSTALL_DIR)
 exists($$LLVM_INSTALL_DIR) {
     SUBDIRS += clangbackend
 
-    LIBTOOLING_LIBS=$$(LIBTOOLING_LIBS)
-    !isEmpty(LIBTOOLING_LIBS) {
+    QTC_NO_CLANG_LIBTOOLING=$$(QTC_NO_CLANG_LIBTOOLING)
+    isEmpty(QTC_NO_CLANG_LIBTOOLING) {
         SUBDIRS += clangrefactoringbackend
         SUBDIRS += clangpchmanagerbackend
     } else {