diff --git a/ansible/tasks/internal/optimizations.yml b/ansible/tasks/internal/optimizations.yml
index 42a0a247c..a059244e7 100644
--- a/ansible/tasks/internal/optimizations.yml
+++ b/ansible/tasks/internal/optimizations.yml
@@ -37,3 +37,10 @@
     - popularity-contest
     - ubuntu-advantage-tools
   when: debpkg_mode or stage2_nix
+
+- name: prefer ipv4 connection resolution
+  become: yes
+  replace:
+    path: /etc/gai.conf
+    regexp: "#precedence ::ffff:0:0/96  100"
+    replace: "precedence ::ffff:0:0/96  100"
diff --git a/common-nix.vars.pkr.hcl b/common-nix.vars.pkr.hcl
index 43c8c386a..a7cf96806 100644
--- a/common-nix.vars.pkr.hcl
+++ b/common-nix.vars.pkr.hcl
@@ -1 +1 @@
-postgres-version = "15.6.1.121"
+postgres-version = "15.6.1.122"