diff --git a/CMakeLists.txt b/CMakeLists.txt
index e49021081..81b0eb463 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -61,14 +61,14 @@ if(NOT CMAKE_BUILD_TYPE)
 	set(CMAKE_BUILD_TYPE Release CACHE STRING "Build type (e.g. Release or Debug)" FORCE)
 endif()
 
-set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${LIBDIR}")
-
 include(GNUInstallDirs)
 
 if (NOT DEFINED LIBDIR)
-	set(LIBDIR "lib")
+	set(LIBDIR "${CMAKE_INSTALL_LIBDIR}")
 endif()
 
+set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_LIBDIR}")
+
 if (NOT DEFINED MANDIR)
 	set(MANDIR ${CMAKE_INSTALL_MANDIR})
 endif()
diff --git a/src/platform/qt/CMakeLists.txt b/src/platform/qt/CMakeLists.txt
index 0701046e7..8700f5514 100644
--- a/src/platform/qt/CMakeLists.txt
+++ b/src/platform/qt/CMakeLists.txt
@@ -167,15 +167,17 @@ if(WIN32)
 		list(APPEND QT_LIBRARIES qwindows imm32)
 	endif()
 endif()
-if(APPLE)
-	set(DATA_DIR Applications/${PROJECT_NAME}.app/Contents/Resources)
-else()
-	set(DATA_DIR ${CMAKE_INSTALL_DATADIR}/${BINARY_NAME})
+if(NOT DEFINED DATADIR)
+	if(APPLE)
+		set(DATADIR Applications/${PROJECT_NAME}.app/Contents/Resources)
+	else()
+		set(DATADIR ${CMAKE_INSTALL_DATADIR}/${BINARY_NAME})
+	endif()
 endif()
-install(DIRECTORY ${CMAKE_SOURCE_DIR}/res/shaders DESTINATION ${DATA_DIR} COMPONENT ${BINARY_NAME}-qt)
-install(FILES ${CMAKE_SOURCE_DIR}/res/nointro.dat DESTINATION ${DATA_DIR} COMPONENT ${BINARY_NAME}-qt)
+install(DIRECTORY ${CMAKE_SOURCE_DIR}/res/shaders DESTINATION ${DATADIR} COMPONENT ${BINARY_NAME}-qt)
+install(FILES ${CMAKE_SOURCE_DIR}/res/nointro.dat DESTINATION ${DATADIR} COMPONENT ${BINARY_NAME}-qt)
 if(NOT WIN32 AND NOT APPLE)
-	list(APPEND QT_DEFINES DATA_DIR="${DATA_DIR}")
+	list(APPEND QT_DEFINES DATADIR="${DATADIR}")
 endif()
 
 add_executable(${BINARY_NAME}-qt WIN32 MACOSX_BUNDLE main.cpp ${CMAKE_SOURCE_DIR}/res/mgba.icns ${SOURCE_FILES} ${PLATFORM_SRC} ${UI_FILES} ${AUDIO_SRC} ${RESOURCES})
diff --git a/src/platform/qt/GBAApp.cpp b/src/platform/qt/GBAApp.cpp
index 8e55d12ad..93db50bcc 100644
--- a/src/platform/qt/GBAApp.cpp
+++ b/src/platform/qt/GBAApp.cpp
@@ -188,8 +188,8 @@ QFileDialog* GBAApp::getSaveFileDialog(QWidget* owner, const QString& title, con
 }
 
 QString GBAApp::dataDir() {
-#ifdef DATA_DIR
-	QString path = QString::fromUtf8(DATA_DIR);
+#ifdef DATADIR
+	QString path = QString::fromUtf8(DATADIR);
 #else
 	QString path = QCoreApplication::applicationDirPath();
 #ifdef Q_OS_MAC