From 5de71b4f6d7e6e1768e096712624e4e2f708d5f1 Mon Sep 17 00:00:00 2001
From: Haonan Chen <chn@chn.moe>
Date: Sun, 4 Jan 2026 21:16:56 +0800
Subject: [PATCH] modules.system.fileSystems.nfs: fix read-only NFS unmounting

---
 modules/system/fileSystems/nfs.nix | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/modules/system/fileSystems/nfs.nix b/modules/system/fileSystems/nfs.nix
index 214216b0..380e3fa7 100644
--- a/modules/system/fileSystems/nfs.nix
+++ b/modules/system/fileSystems/nfs.nix
@@ -38,6 +38,15 @@
             ];
           })
           nfs;
+        systemd.mounts = builtins.map
+          (mount:
+          {
+            where = mount.value.mountPoint or mount.value;
+            what = mount.name;
+            overrideStrategy = "asDropin";
+            mountConfig.ForceUnmount = true;
+          })
+          (builtins.filter (mount: mount.value.readOnly or false) (lib.attrsToList nfs));
         services.rpcbind.enable = true;
       }
       (lib.mkIf (builtins.any (mount: mount.mountBeforeSwitch or true) (builtins.attrValues nfs))