From ed9b377928bf94ae80ef6245f4b50583eacd2db6 Mon Sep 17 00:00:00 2001
From: Sergei Zimmerman <sergei@zimmerman.foo>
Date: Sat, 20 Sep 2025 12:10:48 +0300
Subject: [PATCH] libstore: Disable path info cache for dummy store

---
 src/libstore/include/nix/store/dummy-store.hh | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/libstore/include/nix/store/dummy-store.hh b/src/libstore/include/nix/store/dummy-store.hh
index 0a15667b6..4898e8a5b 100644
--- a/src/libstore/include/nix/store/dummy-store.hh
+++ b/src/libstore/include/nix/store/dummy-store.hh
@@ -4,10 +4,15 @@ namespace nix {
 
 struct DummyStoreConfig : public std::enable_shared_from_this<DummyStoreConfig>, virtual StoreConfig
 {
-    using StoreConfig::StoreConfig;
+    DummyStoreConfig(const Params & params)
+        : StoreConfig(params)
+    {
+        // Disable caching since this a temporary in-memory store.
+        pathInfoCacheSize = 0;
+    }
 
     DummyStoreConfig(std::string_view scheme, std::string_view authority, const Params & params)
-        : StoreConfig(params)
+        : DummyStoreConfig(params)
     {
         if (!authority.empty())
             throw UsageError("`%s` store URIs must not contain an authority part %s", scheme, authority);