diff --git a/rpms/o2-prereq-el9.spec b/rpms/o2-prereq-el9.spec
index 48f251eb..60e602f7 100644
--- a/rpms/o2-prereq-el9.spec
+++ b/rpms/o2-prereq-el9.spec
@@ -44,7 +44,7 @@ mkdir -p $RPM_BUILD_ROOT%_root_sysconfdir/yum.repos.d
 cat > $RPM_BUILD_ROOT%_root_sysconfdir/yum.repos.d/alisw.repo <<EOF
 [alisw]
 name=ALICE Software - EL9
-baseurl=https://s3.cern.ch/swift/v1/alibuild-repo/RPMS/el9.x86_64/
+baseurl=https://s3.cern.ch/swift/v1/alibuild-repo/RPMS/el9.$(uname -m)/
 enabled=0
 gpgcheck=0
 EOF
@@ -52,7 +52,7 @@ EOF
 cat > $RPM_BUILD_ROOT%_root_sysconfdir/yum.repos.d/alisw-upd.repo <<EOF
 [alisw-upd]
 name=ALICE Software - EL9
-baseurl=https://s3.cern.ch/swift/v1/alibuild-repo/UpdRPMS/el9.x86_64/
+baseurl=https://s3.cern.ch/swift/v1/alibuild-repo/UpdRPMS/el9.$(uname -m)/
 enabled=0
 gpgcheck=0
 EOF