diff --git a/gtkglext.spec b/gtkglext.spec
index 3b3d0b3..6cb9ad7 100644
--- a/gtkglext.spec
+++ b/gtkglext.spec
@@ -21,11 +21,10 @@ Name:           gtkglext
 %define git_date 20110529
 Version:        1.2.0git%{git_date}
 Release:        0
-# NOTE: on upgrade to a new upstream version, change the Obsoletes from <= to < (here and in baselibs.conf)
+License:        LGPL-2.1+ and GPL-2.0+
 Summary:        OpenGL Extension to GTK
-License:        GPL-2.0+
-Group:          System/Libraries
 Url:            http://projects.gnome.org/gtkglext/
+Group:          System/Libraries
 # git clone git://git.gnome.org/gtkglext
 # git archive %{git_commit} --prefix=gtkglext-git%{git_date}/ | bzip2 > ../gtkglext-git%{git_date}.tar.bz2
 Source:         %{name}-git%{git_date}.tar.bz2
@@ -33,11 +32,11 @@ Source99:       baselibs.conf
 BuildRequires:  autoconf
 BuildRequires:  automake
 BuildRequires:  freeglut-devel
-BuildRequires:  libtool
 # For directory ownership:
 BuildRequires:  gtk-doc
-BuildRequires:  gtk2-devel >= 2.20
 BuildRequires:  libdrm-devel
+BuildRequires:  libtool
+BuildRequires:  pkgconfig(gtk+-2.0) >= 2.20
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 
 %description
@@ -46,10 +45,10 @@ that support OpenGL rendering in GTK and GtkWidget API add-ons, to make
 GTK+ widgets OpenGL-capable.
 
 %package -n libgtkglext-x11-1_0-0
+License:        LGPL-2.1+
 Summary:        OpenGL Extension to GTK
 Group:          System/Libraries
 Provides:       %{name} = %{version}
-# Note: we keep <= (and a rpmlint warning...) until we get a version higher than 1.2.0 (when this provides/obsoletes was introduced)
 Obsoletes:      %{name} < %{version}
 
 %description -n libgtkglext-x11-1_0-0
@@ -58,6 +57,7 @@ that support OpenGL rendering in GTK and GtkWidget API add-ons, to make
 GTK+ widgets OpenGL-capable.
 
 %package devel
+License:        LGPL-2.1+
 Summary:        OpenGL Extension to GTK
 Group:          System/Libraries
 Requires:       Mesa-devel
@@ -94,7 +94,7 @@ export CFLAGS="%{optflags} -fno-strict-aliasing"
 make %{?_smp_mflags}
 
 %install
-%makeinstall
+%make_install
 rm -f %{buildroot}%{_libdir}/*.la
 
 %clean