diff --git a/src/libutil/experimental-features.cc b/src/libutil/experimental-features.cc
index b758a0262..1fbc99b34 100644
--- a/src/libutil/experimental-features.cc
+++ b/src/libutil/experimental-features.cc
@@ -223,11 +223,14 @@ constexpr std::array<ExperimentalFeatureDetails, 14> xpFeatureDetails = {{
             Set this parameter to `true` to allow stores with databases on read-only
             filesystems to be opened for querying; ordinarily Nix will refuse to do this.
 
-            Enabling this setting disables the locking required for safe concurrent
-            access, so you should be certain that the database will not be changed.
-            While the filesystem the database resides on might be read-only to this
-            process, consider whether another user, process, or system, might have
-            write access to it.
+            This is because SQLite requires write access to the database file to perform
+            the file locking operations necessary for safe concurrent access. When `read-only`
+            is set to `true`, the database will be opened in immutable mode.
+
+            Under this mode, SQLite will not do any locking at all, so you should be certain
+            that the database will not be changed. While the filesystem the database resides
+            on might be read-only to this process, consider whether another user, process,
+            or system, might have write access to it.
         )",
     },
 }};