Merge pull request #8397 from NixLayeredStore/overlayfs-store

Local Overlay Store

src/libutil/experimental-features.cc

@@ -262,6 +262,14 @@ constexpr std::array<ExperimentalFeatureDetails, numXpFeatures> xpFeatureDetails
         )",
         .trackingUrl = "https://github.com/NixOS/nix/milestone/46",
     },
+    {
+        .tag = Xp::LocalOverlayStore,
+        .name = "local-overlay-store",
+        .description = R"(
+            Allow the use of [local overlay store](@docroot@/command-ref/new-cli/nix3-help-stores.md#local-overlay-store).
+        )",
+        .trackingUrl = "https://github.com/NixOS/nix/milestone/50",
+    },
     {
         .tag = Xp::ConfigurableImpureEnv,
         .name = "configurable-impure-env",

src/libutil/experimental-features.hh

@@ -32,6 +32,7 @@ enum struct ExperimentalFeature
     DynamicDerivations,
     ParseTomlTimestamps,
     ReadOnlyLocalStore,
+    LocalOverlayStore,
     ConfigurableImpureEnv,
     MountedSSHStore,
     VerifiedFetches,