diff --git a/libcaca.spec b/libcaca.spec
index c9ae989..a083ef1 100644
--- a/libcaca.spec
+++ b/libcaca.spec
@@ -2,6 +2,12 @@
 %{!?ruby_vendorlibdir: %global ruby_vendorlibdir %(ruby -r rbconfig -e 'print RbConfig::CONFIG["vendorlibdir"]')}
 %{!?ruby_vendorarchdir: %global ruby_vendorarchdir %(ruby -r rbconfig -e 'print RbConfig::CONFIG["vendorarchdir"]')}
 
+%if 0%{?el9}
+%bcond_with    gl
+%else
+%bcond_without gl
+%endif
+
 %define beta beta20
 
 Summary: Library for Colour AsCii Art, text mode graphics
@@ -15,12 +21,10 @@ Source0: https://github.com/cacalabs/libcaca/releases/download/v%{version}.%{bet
 Patch0: libcaca-0.99.beta16-multilib.patch
 
 Buildrequires: doxygen
-BuildRequires: freeglut-devel
 BuildRequires: gcc-c++
 BuildRequires: make
 BuildRequires: slang-devel
 BuildRequires: libX11-devel
-BuildRequires: mesa-libGLU-devel
 BuildRequires: ncurses-devel
 BuildRequires: pkgconfig(imlib2)
 BuildRequires: pkgconfig(pangoft2)
@@ -30,6 +34,10 @@ BuildRequires: ruby
 BuildRequires: ruby-devel
 Buildrequires: texlive-dvips
 Buildrequires: texlive-latex
+%if %{with gl}
+BuildRequires: freeglut-devel
+BuildRequires: mesa-libGLU-devel
+%endif
 
 %description
 libcaca is the Colour AsCii Art library. It provides high level functions for
@@ -39,13 +47,15 @@ well as powerful image to text conversion routines.
 %package devel
 Summary: Development files for libcaca, the library for Colour AsCii Art
 Requires: %{name}%{?_isa} = %{version}-%{release}
-Requires: freeglut-devel
 Requires: imlib2-devel
 Requires: libX11-devel
-Requires: mesa-libGLU-devel
 Requires: ncurses-devel
 Requires: pango-devel
 Requires: slang-devel
+%if %{with gl}
+Requires: freeglut-devel
+Requires: mesa-libGLU-devel
+%endif
 
 %description devel
 libcaca is the Colour AsCii Art library. It provides high level functions for