From de639ceafe75ae25293f49f170ccad0c3e4a133f Mon Sep 17 00:00:00 2001
From: Jared Baur <jaredbaur@fastmail.com>
Date: Sat, 15 Jun 2024 09:06:35 +0000
Subject: [PATCH] Don't chown when local-store is read-only

If the local-store is using the read-only flag, the underlying
filesystem might be read-only, thus an attempt to `chown` would always
fail.
---
 src/libstore/local-store.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc
index b44879cc9..676a035fa 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -233,7 +233,7 @@ LocalStore::LocalStore(const Params & params)
         struct group * gr = getgrnam(settings.buildUsersGroup.get().c_str());
         if (!gr)
             printError("warning: the group '%1%' specified in 'build-users-group' does not exist", settings.buildUsersGroup);
-        else {
+        else if (!readOnly) {
             struct stat st;
             if (stat(realStoreDir.get().c_str(), &st))
                 throw SysError("getting attributes of path '%1%'", realStoreDir);