diff --git a/.cirrus.yml b/.cirrus.yml
index 30dbea0..5c05cf2 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -47,8 +47,20 @@ build_packages_task:
     sed -i '/function install_packages/,/^}/ s/zsh//' devel/scripts/install.sh
 
   script: |
-    cat >Dockerfile <<EOF
-    FROM centos:centos7
+    if [[ "$(uname -m)" == 'x86_64' ]]; then
+      cat >Dockerfile <<EOF
+      FROM centos:centos7
+      RUN cat /etc/yum.repos.d/CentOS-Base.repo
+      RUN sed -i -e 's|mirrorlist=|#mirrorlist=|' -e 's|#baseurl=http://mirror.centos.org/\$releasever|baseurl=https://vault.centos.org/7.9.2009' /etc/yum.repos.d/CentOS-Base.repo
+      EOF
+    else
+      cat >Dockerfile <<EOF
+      FROM centos:centos7
+      RUN sed -i -e 's|mirrorlist=|#mirrorlist=|' -e 's|#baseurl=http://mirror.centos.org/altarch|baseurl=https://vault.centos.org/altarch|' /etc/yum.repos.d/CentOS-Base.repo
+      EOF
+    fi
+
+    cat >>Dockerfile <<EOF
     RUN yum install -y xz file make gettext texinfo
 
     RUN mkdir /devel-env