diff --git a/src/libfetchers/fetch-to-store.cc b/src/libfetchers/fetch-to-store.cc
index 5595f7594..31de2b1e1 100644
--- a/src/libfetchers/fetch-to-store.cc
+++ b/src/libfetchers/fetch-to-store.cc
@@ -46,12 +46,11 @@ std::pair<StorePath, Hash> fetchToStore2(
     if (fingerprint) {
         cacheKey = makeSourcePathToHashCacheKey(*fingerprint, method, subpath.abs());
         if (auto res = fetchers::getCache()->lookup(*cacheKey)) {
-            debug("source path hash cache hit for '%s'", path);
             auto hash = Hash::parseSRI(fetchers::getStrAttr(*res, "hash"));
             auto storePath = store.makeFixedOutputPathFromCA(name,
                 ContentAddressWithReferences::fromParts(method, hash, {}));
-            if (store.isValidPath(storePath)) {
-                debug("source path '%s' has valid store path '%s'", path, store.printStorePath(storePath));
+            if (mode == FetchMode::DryRun || store.isValidPath(storePath)) {
+                debug("source path '%s' cache hit in '%s' (hash '%s')", path, store.printStorePath(storePath), hash.to_string(HashFormat::SRI, true));
                 return {storePath, hash};
             }
             debug("source path '%s' not in store", path);
diff --git a/tests/functional/flakes/flakes.sh b/tests/functional/flakes/flakes.sh
index 878e02682..ddfd7052f 100755
--- a/tests/functional/flakes/flakes.sh
+++ b/tests/functional/flakes/flakes.sh
@@ -115,7 +115,7 @@ nix build -o "$TEST_ROOT/result" "git+file://$flake1Dir?ref=HEAD#default"
 # Check that the fetcher cache works.
 if [[ $(nix config show lazy-trees) = false ]]; then
     nix build -o "$TEST_ROOT/result" "git+file://$flake1Dir?ref=HEAD#default" -vvvvv 2>&1 | grepQuietInverse "source path.*is uncacheable"
-    nix build -o "$TEST_ROOT/result" "git+file://$flake1Dir?ref=HEAD#default" -vvvvv 2>&1 | grepQuiet "source path hash cache hit"
+    nix build -o "$TEST_ROOT/result" "git+file://$flake1Dir?ref=HEAD#default" -vvvvv 2>&1 | grepQuiet "source path.*cache hit"
 fi
 
 # Check that relative paths are allowed for git flakes.