diff -rupN --no-dereference poppler-0.84.0/glib/CMakeLists.txt poppler-0.84.0-new/glib/CMakeLists.txt
--- poppler-0.84.0/glib/CMakeLists.txt	2019-12-28 13:18:51.000000000 +0100
+++ poppler-0.84.0-new/glib/CMakeLists.txt	2020-01-17 20:27:54.194707789 +0100
@@ -4,7 +4,6 @@ include_directories(
 )
 
 include_directories(
-  SYSTEM
   ${GLIB2_INCLUDE_DIRS}
   ${CAIRO_INCLUDE_DIRS}
 )
diff -rupN --no-dereference poppler-0.84.0/test/CMakeLists.txt poppler-0.84.0-new/test/CMakeLists.txt
--- poppler-0.84.0/test/CMakeLists.txt	2019-12-28 13:18:51.000000000 +0100
+++ poppler-0.84.0-new/test/CMakeLists.txt	2020-01-17 20:27:54.194707789 +0100
@@ -18,7 +18,6 @@ endif ()
 if (GTK_FOUND)
 
   include_directories(
-    SYSTEM
     ${GTK3_INCLUDE_DIRS}
   )