diff --git a/OpenGL-0.70.tar.gz b/OpenGL-0.70.tar.gz
index 0b1829f..99a3063 100644
--- a/OpenGL-0.70.tar.gz
+++ b/OpenGL-0.70.tar.gz
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:b20e2af4404b4901ab35bba6ad5e3a8aa60bff72413c99288f01018c4cf874e0
-size 783810
+oid sha256:6f0c01f5116717a17477224c763bce734e259f200eebd66d44249ab0541c658f
+size 779414
diff --git a/perl-OpenGL.spec b/perl-OpenGL.spec
index 649cddc..c7293e3 100644
--- a/perl-OpenGL.spec
+++ b/perl-OpenGL.spec
@@ -25,7 +25,8 @@ Summary:        Perl bindings to the OpenGL API, GLU, and GLUT/FreeGLUT
 License:        GPL-1.0+ or Artistic-1.0
 Group:          Development/Libraries/Perl
 Url:            http://search.cpan.org/dist/OpenGL/
-Source0:        http://search.cpan.org/CPAN/authors/id/C/CH/CHM/OpenGL-0.70.tar.gz
+#Source0:        http://search.cpan.org/CPAN/authors/id/C/CH/CHM/OpenGL-0.70.tar.gz # modified by pre_checkin.sh
+Source0:        OpenGL-0.70.tar.gz
 Source1:        cpanspec.yml
 Patch0:         0001-Don-t-check-current-display-for-extensions.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
diff --git a/pre_checkin.sh b/pre_checkin.sh
new file mode 100644
index 0000000..a19e7a9
--- /dev/null
+++ b/pre_checkin.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+# This script is called automatically during autobuild checkin.
+# to remove unneccesary files that make legal checks hard
+
+if tar tf OpenGL-*.tar.gz|grep -q glu.h ; then
+    set -x
+    set -e
+    gzip -cd OpenGL-*.tar.gz > .tar.tmp
+    tar --wildcards --delete -f .tar.tmp OpenGL-\*/include/GL/{glu,glut,freeglut}.h
+    gzip -c9n .tar.tmp > OpenGL-*.tar.gz
+fi
+true