diff --git a/OpenSceneGraph.spec b/OpenSceneGraph.spec
index 5cb87e7ac9573f2dd89b8bc1d96277d6ab201c95..41beee2fd0af9f42d4a9306004220b62efccaf44 100644
--- a/OpenSceneGraph.spec
+++ b/OpenSceneGraph.spec
@@ -4,7 +4,9 @@
 %bcond_with  Coin4
 %bcond_without  jasper
 %bcond_without  OpenEXR
-%bcond_without  Collada
+%bcond_with  Collada
+%bcond_with  las
+%bcond_with  gtkglext
 %bcond_with wxWidgets
 %bcond_with mingw
 
@@ -39,7 +41,9 @@ BuildRequires:  libcurl-devel
 BuildRequires:  libGL-devel
 BuildRequires:  libGLU-devel
 BuildRequires:  libjpeg-devel
-BuildRequires:  liblas-devel
+%if %{with las}
+#BuildRequires:  liblas-devel
+%endif
 BuildRequires:  libpng-devel
 BuildRequires:  libtiff-devel
 BuildRequires:  libvncserver-devel
@@ -51,7 +55,9 @@ BuildRequires:  openal-soft-devel
 BuildRequires:  pkgconfig(cairo)
 BuildRequires:  pkgconfig(gta)
 BuildRequires:  pkgconfig(gtk+-2.0)
-BuildRequires:  pkgconfig(gtkglext-x11-1.0)
+%if %{with gtkglext}
+#BuildRequires:  pkgconfig(gtkglext-x11-1.0)
+%endif
 BuildRequires:  pkgconfig(poppler-glib)
 BuildRequires:  pkgconfig(librsvg-2.0) >= 2.35
 BuildRequires:  pkgconfig(xrandr)
@@ -63,7 +69,9 @@ BuildRequires:  SDL2-devel
 BuildRequires:  SDL-devel
 
 %{?with_OpenEXR:BuildRequires:    cmake(OpenEXR)}
-%{?with_Collada:BuildRequires:    pkgconfig(collada-dom)}
+%if %{with collada}
+#%{?with_Collada:BuildRequires:    pkgconfig(collada-dom)}
+%endif
 %{?with_jasper:BuildRequires:     jasper-devel}
 %{?with_gstreamer:BuildRequires:  pkgconfig(gstreamer-1.0)}
 %{?with_gstreamer:BuildRequires:  pkgconfig(gstreamer-base-1.0)}
@@ -339,7 +347,9 @@ mkdir -p %{buildroot}%{_datadir}/OpenSceneGraph
 %{?with_jasper:%{_libdir}/osgPlugins-%{version}/osgdb_jp2.so}
 %{_libdir}/osgPlugins-%{version}/osgdb_jpeg.so
 %{_libdir}/osgPlugins-%{version}/osgdb_ktx.so
+%if %{with las}
 %{_libdir}/osgPlugins-%{version}/osgdb_las.so
+%endif
 %{_libdir}/osgPlugins-%{version}/osgdb_logo.so
 %{_libdir}/osgPlugins-%{version}/osgdb_lua.so
 %{_libdir}/osgPlugins-%{version}/osgdb_lwo.so
@@ -670,7 +680,9 @@ mkdir -p %{buildroot}%{_datadir}/OpenSceneGraph
 %{_bindir}/osgviewerFLTK
 
 %files examples-gtk
+%if %{with gtkglext}
 %{_bindir}/osgviewerGTK
+%endif
 
 %files -n OpenThreads
 %doc AUTHORS.txt NEWS.txt README.md