diff --git a/cmake/QtCreatorAPI.cmake b/cmake/QtCreatorAPI.cmake
index 82f7897b6d5..993102e139a 100644
--- a/cmake/QtCreatorAPI.cmake
+++ b/cmake/QtCreatorAPI.cmake
@@ -229,7 +229,11 @@ function(set_public_includes target includes)
     if (NOT IS_ABSOLUTE ${inc_dir})
       set(inc_dir "${CMAKE_CURRENT_SOURCE_DIR}/${inc_dir}")
     endif()
-    target_include_directories(${target} PUBLIC $<BUILD_INTERFACE:${inc_dir}>)
+    file(RELATIVE_PATH include_dir_relative_path ${PROJECT_SOURCE_DIR} ${inc_dir})
+    target_include_directories(${target} PUBLIC
+      $<BUILD_INTERFACE:${inc_dir}>
+      $<INSTALL_INTERFACE:include/${include_dir_relative_path}>
+    )
   endforeach()
 endfunction()
 
diff --git a/src/libs/qmljs/CMakeLists.txt b/src/libs/qmljs/CMakeLists.txt
index 2c05b662c3b..243966afdad 100644
--- a/src/libs/qmljs/CMakeLists.txt
+++ b/src/libs/qmljs/CMakeLists.txt
@@ -7,6 +7,7 @@ add_qtc_library(QmlJS
     parser/qmljsast.cpp parser/qmljsast_p.h
     parser/qmljsastfwd_p.h
     parser/qmljsastvisitor.cpp parser/qmljsastvisitor_p.h
+    parser/qmljsdiagnosticmessage_p.h
     parser/qmljsengine_p.cpp parser/qmljsengine_p.h
     parser/qmljsglobal_p.h
     parser/qmljsgrammar.cpp parser/qmljsgrammar_p.h
diff --git a/src/plugins/qmldesigner/CMakeLists.txt b/src/plugins/qmldesigner/CMakeLists.txt
index 42feb7c13f7..75a8571b818 100644
--- a/src/plugins/qmldesigner/CMakeLists.txt
+++ b/src/plugins/qmldesigner/CMakeLists.txt
@@ -144,6 +144,7 @@ extend_qtc_plugin(QmlDesigner
 
 extend_qtc_plugin(QmlDesigner
   SOURCES_PREFIX ../../../share/qtcreator/qml/qmlpuppet/interfaces
+  PUBLIC_INCLUDES ../../../share/qtcreator/qml/qmlpuppet/interfaces
   SOURCES
     nodeinstanceserverinterface.cpp
     commondefines.h
@@ -202,6 +203,7 @@ extend_qtc_plugin(QmlDesigner
 
 extend_qtc_plugin(QmlDesigner
   SOURCES_PREFIX components/formeditor
+  PUBLIC_INCLUDES components/formeditor
   SOURCES
     abstractcustomtool.cpp abstractcustomtool.h
     abstractformeditortool.cpp abstractformeditortool.h
@@ -257,6 +259,7 @@ extend_qtc_plugin(QmlDesigner
 
 extend_qtc_plugin(QmlDesigner
   SOURCES_PREFIX components/integration
+  PUBLIC_INCLUDES components/integration
   SOURCES
     componentaction.cpp componentaction.h
     componentview.cpp componentview.h
@@ -470,6 +473,7 @@ extend_qtc_plugin(QmlDesigner
 
 extend_qtc_plugin(QmlDesigner
   SOURCES_PREFIX designercore
+  PUBLIC_INCLUDES designercore
   SOURCES
     metainfo/itemlibraryinfo.cpp
     metainfo/metainfo.cpp