diff --git a/nvidia-open-driver-G06-signed.changes b/nvidia-open-driver-G06-signed.changes
index bd06315..6eea7fa 100644
--- a/nvidia-open-driver-G06-signed.changes
+++ b/nvidia-open-driver-G06-signed.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Feb  3 14:27:28 UTC 2025 - Stefan Dirsch <sndirsch@suse.com>
+
+- fixed build against openSUSE:Factory by defining %_builddir
+  if needed (boo#1236746)
+
 -------------------------------------------------------------------
 Mon Feb  3 13:42:45 UTC 2025 - Stefan Dirsch <sndirsch@suse.com>
 
diff --git a/nvidia-open-driver-G06-signed.spec b/nvidia-open-driver-G06-signed.spec
index 0488882..cddb8a2 100644
--- a/nvidia-open-driver-G06-signed.spec
+++ b/nvidia-open-driver-G06-signed.spec
@@ -102,6 +102,10 @@ ExclusiveArch:  x86_64 aarch64
 %if 0%{!?kmp_template_name:1}
 %define kmp_template_name /usr/lib/rpm/kernel-module-subpackage
 %endif
+%if 0%{!?_builddir:1}
+%define _builddir /home/abuild/rpmbuild/BUILD
+%endif
+
 %(cat %kmp_template_name > %_builddir/nvidia-kmp-template)
 %(echo "%triggerin -p /bin/bash -n %%{-n*}-kmp-%1 -- nvidia-common-G06 = %{version}"      >> %_builddir/nvidia-kmp-template)
 %(cat %_sourcedir/kmp-trigger.sh                                                          >> %_builddir/nvidia-kmp-template)