diff --git a/default.nix b/default.nix
index 40a672507c..aa125e60a1 100644
--- a/default.nix
+++ b/default.nix
@@ -50,7 +50,19 @@ let
 
   postgresqlVersions =
     [
-      { name = "postgresql-16"; postgresql = pkgs.postgresql_16.withPackages (p: [ p.postgis p.pg_safeupdate ]); }
+      {
+        name = "postgresql-16";
+        postgresql = pkgs.postgresql_16.withPackages (p: [
+          p.postgis
+          (p.pg_safeupdate.overrideAttrs (old: {
+            installPhase = ''
+              mkdir -p $out/bin
+              cp safeupdate.dylib safeupdate.so || true
+              install -D safeupdate.so -t $out/lib
+            '';
+          }))
+        ]);
+      }
       { name = "postgresql-15"; postgresql = pkgs.postgresql_15.withPackages (p: [ p.postgis p.pg_safeupdate ]); }
       { name = "postgresql-14"; postgresql = pkgs.postgresql_14.withPackages (p: [ p.postgis p.pg_safeupdate ]); }
       { name = "postgresql-13"; postgresql = pkgs.postgresql_13.withPackages (p: [ p.postgis p.pg_safeupdate ]); }