diff --git a/cmake/FindGTK3.cmake b/cmake/FindGTK3.cmake
index 049a276f..9e75806c 100644
--- a/cmake/FindGTK3.cmake
+++ b/cmake/FindGTK3.cmake
@@ -50,6 +50,7 @@ if(GTK3_LIBRARY)
   set_property(TARGET ${GTK3} PROPERTY INTERFACE_COMPILE_OPTIONS "${GTK3_PKG_CFLAGS_OTHER}")
 
   set(GTK3_INCLUDE_DIRS)
+  include_directories(/usr/include/harfbuzz)
 
   find_path(GTK3_INCLUDE_DIR "gtk/gtk.h"
     HINTS ${GTK3_PKG_INCLUDE_DIRS})
diff --git a/plugins/peopsxgl/CMakeLists.txt b/plugins/peopsxgl/CMakeLists.txt
index 907009ce..850da301 100644
--- a/plugins/peopsxgl/CMakeLists.txt
+++ b/plugins/peopsxgl/CMakeLists.txt
@@ -18,6 +18,7 @@ set(GTK_LIBRARIES ${GTK3_LIBRARY} ${GDK3_LIBRARY} ${GDKPixbuf_LIBRARY} ${Pango_L
 
 find_package(X11 REQUIRED)
 
+set(OpenGL_GL_PREFERENCE LEGACY)
 find_package(OpenGL REQUIRED)
 if(NOT OPENGL_FOUND)
     message(FATAL_ERROR "GL library not found")