diff --git a/gegl.changes b/gegl.changes
index 0019a00..41f9396 100644
--- a/gegl.changes
+++ b/gegl.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Fri Jul 19 07:40:24 UTC 2024 - Bernhard Wiedemann <bwiedemann@suse.com>
+
+- Add normalize-gir.pl to strip details about build machines
+  to achive reproducible builds
+
 -------------------------------------------------------------------
 Thu Feb 22 01:59:19 UTC 2024 - Marcus Rueckert <mrueckert@suse.de>
 
diff --git a/gegl.spec b/gegl.spec
index cb5fafd..5a20cd9 100644
--- a/gegl.spec
+++ b/gegl.spec
@@ -33,6 +33,7 @@ License:        GPL-3.0-or-later AND LGPL-3.0-or-later
 Group:          Productivity/Graphics/Other
 URL:            http://gegl.org/
 Source0:        https://download.gimp.org/pub/gegl/0.4/%{name}-%{version}.tar.xz
+Source1:        normalize-gir.pl
 Source99:       baselibs.conf
 
 BuildRequires:  ImageMagick
@@ -186,6 +187,7 @@ export LD_PRELOAD="/usr/lib64/libgomp.so.1"
 
 %install
 %meson_install
+perl -i %{SOURCE1} %{buildroot}%{_datadir}/gir-1.0/Gegl-0.4.gir
 find %{buildroot} -type f -name "*.la" -delete -print
 %find_lang %{name}-0.4 %{?no_lang_C}
 
diff --git a/normalize-gir.pl b/normalize-gir.pl
new file mode 100644
index 0000000..a198dfe
--- /dev/null
+++ b/normalize-gir.pl
@@ -0,0 +1,20 @@
+#!/usr/bin/perl -w
+# SPDX-License-Identifier: LGPL-3.0-or-later
+# written by Bernhard M. Wiedemann in 2024
+# to normalize the .gir file values
+# for reproducible builds of the gegl package
+use strict;
+
+my $property = "";
+while(<>) {
+    if(m/<property name="([^"]+)"/) {
+        $property = $1;
+    }
+    if($property eq "threads") {
+        s/(default-value=)"[^"]+"/$1"4"/;
+    }
+    if($property eq "tile-cache-size") {
+        s/(default-value=)"[^"]+"/$1"4000000000"/;
+    }
+    print;
+}