diff --git a/src/libflake/flake/lockfile.cc b/src/libflake/flake/lockfile.cc
index 25e7299f0a0..e3bf22c21df 100644
--- a/src/libflake/flake/lockfile.cc
+++ b/src/libflake/flake/lockfile.cc
@@ -45,9 +45,16 @@ LockedNode::LockedNode(
     , isFlake(json.find("flake") != json.end() ? (bool) json["flake"] : true)
     , parentInputAttrPath(json.find("parent") != json.end() ? (std::optional<InputAttrPath>) json["parent"] : std::nullopt)
 {
-    if (!lockedRef.input.isConsideredLocked(fetchSettings) && !lockedRef.input.isRelative())
-        throw Error("Lock file contains unlocked input '%s'. Use '--allow-dirty-locks' to accept this lock file.",
-            fetchers::attrsToJSON(lockedRef.input.toAttrs()));
+    if (!lockedRef.input.isLocked() && !lockedRef.input.isRelative()) {
+        if (lockedRef.input.getNarHash())
+            warn(
+                "Lock file entry '%s' is unlocked (e.g. lacks a Git revision) but does have a NAR hash. "
+                "This is deprecated since such inputs are verifiable but may not be reproducible.",
+                lockedRef.to_string());
+        else
+            throw Error("Lock file contains unlocked input '%s'. Use '--allow-dirty-locks' to accept this lock file.",
+                fetchers::attrsToJSON(lockedRef.input.toAttrs()));
+    }
 
     // For backward compatibility, lock file entries are implicitly final.
     assert(!lockedRef.input.attrs.contains("__final"));
diff --git a/tests/functional/flakes/unlocked-override.sh b/tests/functional/flakes/unlocked-override.sh
index dcb427a8fcc..512aca401d3 100755
--- a/tests/functional/flakes/unlocked-override.sh
+++ b/tests/functional/flakes/unlocked-override.sh
@@ -37,8 +37,8 @@ expectStderr 1 nix flake lock "$flake2Dir" --override-input flake1 "$TEST_ROOT/f
 
 nix flake lock "$flake2Dir" --override-input flake1 "$TEST_ROOT/flake1" --allow-dirty-locks
 
-# Using a lock file with a dirty lock requires --allow-dirty-locks as well.
-expectStderr 1 nix eval "$flake2Dir#x" |
-  grepQuiet "Lock file contains unlocked input"
+# Using a lock file with a dirty lock does not require --allow-dirty-locks, but should print a warning.
+expectStderr 0 nix eval "$flake2Dir#x" |
+  grepQuiet "warning: Lock file entry .* is unlocked"
 
-[[ $(nix eval "$flake2Dir#x" --allow-dirty-locks) = 456 ]]
+[[ $(nix eval "$flake2Dir#x") = 456 ]]