From 7f443e04283b027dff8589eb54473313be877577 Mon Sep 17 00:00:00 2001
From: Ben Radford <benradf@users.noreply.github.com>
Date: Tue, 16 May 2023 13:57:13 +0100
Subject: [PATCH] Do not check for write access to database when read-only.

---
 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 5d9e96441..b0f6709aa 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -480,7 +480,7 @@ int LocalStore::getSchema()
 
 void LocalStore::openDB(State & state, bool create)
 {
-    if (access(dbDir.c_str(), R_OK | W_OK))
+    if (access(dbDir.c_str(), R_OK | (readOnly ? 0 : W_OK)))
         throw SysError("Nix database directory '%1%' is not writable", dbDir);
 
     /* Open the Nix database. */