diff --git a/freecad.spec b/freecad.spec
index 87a2936..4f579de 100644
--- a/freecad.spec
+++ b/freecad.spec
@@ -1,4 +1,5 @@
 %define oname FreeCAD
+%global optflags %(echo %{optflags} | sed -e 's/-ffat-lto-objects//g' -e 's/-fvar-tracking-assignments//g' -e 's/-Wa,--compress-debug-sections//g')
 
 Summary:	FreeCAD is a general purpose 3D CAD modeler
 Name:		freecad
@@ -42,17 +43,17 @@ BuildRequires:	vtk-devel
 BuildRequires:	vtk-test-suite
 BuildRequires:  swig
 # Qt5 + Python3
-BuildRequires:  pkgconfig(Qt5Core)
-BuildRequires:  pkgconfig(Qt5OpenGL)
-BuildRequires:  pkgconfig(Qt5WebEngine)
-BuildRequires:  pkgconfig(Qt5XmlPatterns)
-BuildRequires:  pkgconfig(Qt5X11Extras)
-BuildRequires:  pkgconfig(Qt5Xml)
-BuildRequires:  pkgconfig(Qt5PrintSupport)
-BuildRequires:  pkgconfig(Qt5Svg)
-BuildRequires:  pkgconfig(Qt5UiTools)
-BuildRequires:  pkgconfig(Qt5Concurrent)
-BuildRequires:  pkgconfig(Qt5WebKitWidgets)
+#BuildRequires:  pkgconfig(Qt5Core)
+#BuildRequires:  pkgconfig(Qt5OpenGL)
+#BuildRequires:  pkgconfig(Qt5WebEngine)
+#BuildRequires:  pkgconfig(Qt5XmlPatterns)
+#BuildRequires:  pkgconfig(Qt5X11Extras)
+#BuildRequires:  pkgconfig(Qt5Xml)
+#BuildRequires:  pkgconfig(Qt5PrintSupport)
+#BuildRequires:  pkgconfig(Qt5Svg)
+#BuildRequires:  pkgconfig(Qt5UiTools)
+#BuildRequires:  pkgconfig(Qt5Concurrent)
+#BuildRequires:  pkgconfig(Qt5WebKitWidgets)
 BuildRequires:  python3-matplotlib
 #BuildRequires:  python3-pivy
 BuildRequires:  python3-ply